roulette 1 to 100

Roulette is a timeless casino game that has captivated players for centuries. Its simplicity and the thrill of the spin make it a favorite among both novice and seasoned gamblers. However, the traditional roulette game has evolved over time, giving rise to various variations. One such intriguing variant is the “Roulette 1 to 100.” This version introduces a new level of excitement and strategy, making it a must-try for any roulette enthusiast. What is Roulette 1 to 100? Roulette 1 to 100 is a modern adaptation of the classic roulette game, where the numbers on the wheel range from 1 to 100 instead of the traditional 0 to 36.

Ad Disclosure

ALLTop Rated By UsersLatestPopular

Updated: -

• Starlight Betting Lounge
  new

  

  Celestial Bet100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Cash King Palace
  

  Royal Wins100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Lucky Ace Palace
  

  Luck&Luxury100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Golden Spin Casino
  

  Luxury Play100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Spin Palace Casino
  

  Win Big Now100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Silver Fox Slots
  

  Elegance+Fun100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Lucky Ace Casino
  

  Luck&Luxury100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Diamond Crown Casino
  

  Opulence & Fun100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Royal Fortune Gaming
  

  Opulence & Thrills100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more
• Victory Slots Resort
  

  Spin to Win100% / $1500

  Casino popularity:

  Collecting more data...

  Payment methods

  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 
  • 

  Play
  • Wagering: 35 x (b)
  • Withdrawal time: 1 days
  • Minimum deposit to casino: $30
  • Bonus max bet: $5
  • Established: 2024
  • Free Spins: 200

  • 1st Deposit Bonus:100% / $1500 + 200 Free Spins
  • Bonus code: FRUIT22nd Deposit Bonus:100% / $1500 + 75 Free Spins
  • Bonus code: FRUIT33rd Deposit Bonus:75% / $3000 + 75 Free Spins
  • Bonus code: FRUIT44th Deposit Bonus:50% / $4500 + 200 Free Spins

  • Leading selection of slots
  • VISA casino site
  • HD streaming casino games
  • Newly unveiled casino
  • Signup offer now available
  • Mr. Gamble special bonuses

  Get the full details

  

  
  Show more

Source

1. roulette 1 to 100
2. roulette 1 to 100
3. roulette 1 to 100
4. roulette 1 to 100
5. roulette 1 to 100
6. roulette 1 to 100

roulette 1 to 100

Roulette is a timeless casino game that has captivated players for centuries. Its simplicity and the thrill of the spin make it a favorite among both novice and seasoned gamblers. However, the traditional roulette game has evolved over time, giving rise to various variations. One such intriguing variant is the “Roulette 1 to 100.” This version introduces a new level of excitement and strategy, making it a must-try for any roulette enthusiast.

What is Roulette 1 to 100?

Roulette 1 to 100 is a modern adaptation of the classic roulette game, where the numbers on the wheel range from 1 to 100 instead of the traditional 0 to 36. This significant expansion of the number field introduces a new dimension to the game, offering players more opportunities to bet and potentially win.

Key Features of Roulette 1 to 100

• Expanded Number Field: The wheel now includes numbers from 1 to 100, providing a broader range of betting options.
• Increased Odds: With more numbers, the odds of hitting a specific number are lower, but the payouts can be significantly higher.
• New Betting Strategies: Players can explore new betting strategies and combinations, such as betting on multiple numbers or ranges.

How to Play Roulette 1 to 100

Playing Roulette 1 to 100 is similar to traditional roulette, with a few key differences:

1. Place Your Bets: Players place their bets on the numbers or combinations they believe the ball will land on. The betting table includes numbers from 1 to 100, along with various betting options like odd/even, red/black, and ranges.
2. Spin the Wheel: The dealer spins the wheel, and the ball is released. The wheel contains numbers from 1 to 100, arranged in a random order.
3. Determine the Winner: The ball lands on a specific number, and all winning bets are paid out according to the odds.

Betting Options in Roulette 1 to 100

• Straight Up: Bet on a single number.
• Split: Bet on two adjacent numbers.
• Street: Bet on three numbers in a horizontal line.
• Corner: Bet on four numbers that form a square.
• Range Bets: Bet on a range of numbers, such as 1-25, 26-50, 51-75, or 76-100.
• Odd/Even: Bet on whether the number will be odd or even.
• Red/Black: Bet on whether the number will be red or black.

Strategies for Winning at Roulette 1 to 100

Given the expanded number field, players need to adapt their strategies to increase their chances of winning. Here are some tips:

• Spread Bets: Instead of focusing on a single number, spread your bets across multiple numbers or ranges to cover more possibilities.
• Use Probability: Understand the probability of each number being hit. For example, betting on a range like 1-25 might be more advantageous than betting on a single number.
• Manage Your Bankroll: Set a budget and stick to it. Roulette 1 to 100 can be more volatile due to the increased number of options, so managing your bankroll is crucial.
• Observe Patterns: While roulette is a game of chance, observing patterns in the wheel’s behavior can sometimes give you an edge.

Where to Play Roulette 1 to 100

Roulette 1 to 100 is available in select online casinos and some land-based establishments. To find a reputable platform to play, consider the following:

• Online Casinos: Many online casinos offer Roulette 1 to 100 as part of their game selection. Look for licensed and regulated platforms with good reviews.
• Land-Based Casinos: Some brick-and-mortar casinos may feature this variant in their roulette section. Check with your local casino for availability.

Roulette 1 to 100 offers a fresh and exciting take on the classic game, providing more betting options and a higher potential for big wins. Whether you’re a seasoned roulette player or a newcomer to the game, this variant is worth exploring. With its expanded number field and new betting strategies, Roulette 1 to 100 is sure to keep you on the edge of your seat.

top online roulette sites for real money: best casinos & bonuses

Online roulette has become a staple in the world of online gambling, offering players the thrill of the casino from the comfort of their homes. With numerous platforms vying for attention, it can be challenging to identify the best sites for real money roulette. This article highlights the top online roulette sites, focusing on the best casinos and the bonuses they offer.

1. Betway Casino

Overview

Betway Casino is renowned for its extensive selection of games, including a robust roulette section. The platform is user-friendly, making it accessible for both beginners and seasoned players.

Bonuses

• Welcome Bonus: Up to $1,000 spread over your first three deposits.
• Daily Deals: Regular promotions and bonuses tailored for roulette enthusiasts.

2. 888 Casino

Overview

888 Casino is a veteran in the online gambling industry, known for its reliability and diverse game offerings. The roulette section is particularly impressive, featuring multiple variants.

Bonuses

• Welcome Bonus: \(88 free play just for signing up, plus a 100% match bonus up to \)1,500 on your first deposit.
• Daily Promotions: Special offers and bonuses available daily.

3. LeoVegas Casino

Overview

LeoVegas Casino is a mobile-first platform that offers a seamless experience across devices. The roulette games are optimized for mobile play, ensuring a smooth experience.

Bonuses

• Welcome Bonus: Up to $1,000 plus 200 free spins on selected slots.
• Weekly Promotions: Regular bonuses and free spins for roulette players.

4. Royal Panda Casino

Overview

Royal Panda Casino is known for its luxurious feel and high-quality games. The roulette section includes classic and modern variants, catering to all types of players.

Bonuses

• Welcome Bonus: 100% match bonus up to $100 plus 10 free spins on selected slots.
• Lucky 21: A unique promotion where you can win up to $210 every 21st of the month.

5. Spin Casino

Overview

Spin Casino offers a comprehensive selection of roulette games, including live dealer options. The platform is secure and offers excellent customer support.

Bonuses

• Welcome Bonus: Up to $1,000 spread over your first three deposits.
• Loyalty Program: Earn points for every bet you place, which can be redeemed for bonuses and other rewards.

6. Mansion Casino

Overview

Mansion Casino is a trusted name in the online gambling industry, offering a wide range of roulette games. The platform is known for its high-quality graphics and smooth gameplay.

Bonuses

• Welcome Bonus: 100% match bonus up to $500 on your first deposit.
• VIP Program: Exclusive bonuses and promotions for loyal players.

7. Casumo Casino

Overview

Casumo Casino is known for its unique gamified approach to online gambling. The roulette section is well-organized and offers a variety of games.

Bonuses

• Welcome Bonus: 100% match bonus up to $500 plus 20 free spins on selected slots.
• Adventure Rewards: Earn points and level up to unlock bonuses and rewards.

8. Unibet Casino

Overview

Unibet Casino offers a diverse range of roulette games, including live dealer options. The platform is user-friendly and offers excellent customer support.

Bonuses

• Welcome Bonus: 100% match bonus up to $500 on your first deposit.
• Daily Offers: Regular promotions and bonuses for roulette players.

9. Mr Green Casino

Overview

Mr Green Casino is known for its stylish design and extensive game selection. The roulette section includes classic and modern variants, ensuring something for everyone.

Bonuses

• Welcome Bonus: Up to $1,200 plus 200 free spins on selected slots.
• Green Gaming: A unique feature that helps players set limits and manage their gambling habits.

10. William Hill Casino

Overview

William Hill Casino is a well-established platform with a strong reputation in the industry. The roulette section is comprehensive, offering a variety of games.

Bonuses

• Welcome Bonus: 100% match bonus up to $300 on your first deposit.
• Ongoing Promotions: Regular bonuses and promotions for roulette players.

Choosing the right online roulette site for real money can significantly enhance your gaming experience. The above list of top casinos offers a mix of excellent bonuses, diverse game selections, and reliable platforms, ensuring you have the best possible experience. Whether you’re a beginner or a seasoned player, these sites cater to all levels of expertise.

premium european roulette online: play the best european roulette games

European Roulette is one of the most iconic and beloved casino games worldwide. Its simplicity, combined with the thrill of chance, makes it a favorite among both novice and seasoned players. With the advent of online casinos, the experience of playing European Roulette has been elevated to new heights. Here’s why premium European Roulette online is the best way to enjoy this classic game.

Why Choose Premium European Roulette Online?

1. Authentic Experience

• Realistic Graphics and Sound: Premium online European Roulette games offer high-definition graphics and realistic sound effects that mimic the ambiance of a real casino.
• Live Dealer Games: For an even more immersive experience, many premium platforms offer live dealer European Roulette, where you can interact with a real dealer and other players in real-time.

2. Variety of Bets

• Inside and Outside Bets: Enjoy the full range of betting options, including straight-up bets, split bets, street bets, corner bets, and more.
• Special Features: Some premium games include unique betting options and features that add an extra layer of excitement to the game.

3. Convenience and Accessibility

• Play Anywhere, Anytime: With premium European Roulette online, you can play from the comfort of your home or on the go via mobile devices.
• Multiple Platforms: Access your favorite European Roulette games on various platforms, including desktop, mobile, and tablet.

4. Bonuses and Promotions

• Welcome Bonuses: Many premium online casinos offer generous welcome bonuses that can be used on European Roulette games.
• Loyalty Programs: Enjoy exclusive perks and rewards by participating in loyalty programs offered by premium casinos.

Top Premium European Roulette Online Casinos

1. Betway Casino

• Features: High-quality graphics, live dealer games, and a wide range of betting options.
• Bonuses: Welcome bonus of up to $1,000 and regular promotions.

2. 888 Casino

• Features: User-friendly interface, mobile compatibility, and a variety of European Roulette games.
• Bonuses: \(88 free for new players and a 100% deposit match up to \)1,500.

3. LeoVegas Casino

• Features: Award-winning mobile platform, live dealer games, and a vast selection of roulette variants.
• Bonuses: Up to $1,000 in welcome bonuses and 200 free spins.

4. Royal Panda Casino

• Features: Smooth gameplay, live casino experience, and a user-friendly interface.
• Bonuses: 100% welcome bonus up to $100 and regular promotions.

Tips for Playing Premium European Roulette Online

1. Understand the Rules

• Basic Rules: Familiarize yourself with the basic rules of European Roulette, including the different types of bets and their payouts.
• House Edge: Understand the house edge in European Roulette, which is lower than in American Roulette due to the absence of the double zero.

2. Manage Your Bankroll

• Set Limits: Establish a budget for your gaming session and stick to it.
• Responsible Gambling: Always gamble responsibly and know when to stop.

3. Take Advantage of Bonuses

• Welcome Bonuses: Use welcome bonuses to extend your playing time and increase your chances of winning.
• Promotions: Keep an eye on ongoing promotions and special offers that can enhance your gaming experience.

4. Practice with Free Games

• Free Play: Many premium online casinos offer free versions of European Roulette where you can practice without risking real money.
• Strategy: Use free play to test different betting strategies and find what works best for you.

Premium European Roulette online offers an unparalleled gaming experience with authentic graphics, a variety of betting options, and the convenience of playing from anywhere. By choosing a reputable online casino and following some basic tips, you can enjoy this classic game to the fullest. Whether you’re a seasoned player or a newcomer, premium European Roulette online is the perfect way to experience the thrill of roulette.

play european online roulette - best casinos & bonuses

European Online Roulette is one of the most popular casino games, offering a thrilling blend of strategy and chance. Whether you’re a seasoned player or a newcomer, finding the right online casino and taking advantage of the best bonuses can significantly enhance your gaming experience. This article will guide you through the best casinos to play European Online Roulette and the top bonuses available.

Why Play European Online Roulette?

European Roulette is preferred by many players over its American counterpart due to its single zero pocket, which reduces the house edge. This makes it a more favorable game for players who enjoy a fair chance at winning.

Key Features of European Roulette:

• Single Zero Pocket: Reduces the house edge to 2.7%.
• Classic Layout: Familiar and easy-to-understand layout.
• Strategic Options: Wide range of betting options, from inside and outside bets to special bets.

Best Casinos for European Online Roulette

Choosing the right casino is crucial for an optimal gaming experience. Here are some of the best online casinos where you can play European Online Roulette:

1. Betway Casino

• User-Friendly Interface: Easy navigation and a smooth gaming experience.
• Wide Range of Bets: From low to high stakes, catering to all types of players.
• Live Dealer Games: Enjoy the thrill of live European Roulette.

2. 888 Casino

• Exclusive Bonuses: Special offers and promotions for roulette players.
• High RTP: Competitive return-to-player rates.
• Mobile Compatibility: Play on the go with their mobile app.

3. LeoVegas Casino

• VIP Program: Exclusive rewards and bonuses for loyal players.
• Multiple Game Versions: Various versions of European Roulette to choose from.
• ²⁴⁄₇ Support: Reliable customer support available around the clock.

4. Royal Panda Casino

• Generous Welcome Bonus: A lucrative offer for new players.
• High-Quality Graphics: Immersive and visually appealing game experience.
• Regular Promotions: Ongoing offers to keep the excitement alive.

Top Bonuses for European Online Roulette

Maximizing your bonuses can give you a significant edge when playing European Online Roulette. Here are some of the best bonuses available:

1. Welcome Bonuses

• Betway Casino: 100% match bonus up to $250.
• 888 Casino: $88 free play just for signing up.
• LeoVegas Casino: Up to $1,000 in welcome bonuses.
• Royal Panda Casino: 100% match bonus up to $100.

2. No Deposit Bonuses

• 888 Casino: $88 free play without any deposit required.
• LeoVegas Casino: Free spins and bonus cash for new users.

3. Reload Bonuses

• Betway Casino: Regular reload bonuses to keep your bankroll topped up.
• Royal Panda Casino: Weekly and monthly reload offers.

4. VIP and Loyalty Programs

• LeoVegas Casino: Exclusive VIP rewards and personalized bonuses.
• 888 Casino: Comp points that can be exchanged for cash.

Tips for Playing European Online Roulette

To make the most out of your European Online Roulette experience, consider these tips:

1. Understand the Rules

• Familiarize yourself with the different types of bets and their payouts.
• Know the difference between inside and outside bets.

2. Manage Your Bankroll

• Set a budget and stick to it.
• Avoid chasing losses and know when to walk away.

3. Take Advantage of Bonuses

• Use welcome bonuses to extend your playing time.
• Regularly check for reload bonuses and promotions.

4. Practice with Free Games

• Many online casinos offer free versions of European Roulette.
• Use these to practice and develop your strategy.

European Online Roulette offers a thrilling and potentially rewarding gaming experience. By choosing the right casino and taking advantage of the best bonuses, you can enhance your gameplay and increase your chances of winning. Whether you’re playing at Betway, 888 Casino, LeoVegas, or Royal Panda, make sure to enjoy the game responsibly and have fun.

Frequently Questions