perfect pairs 21 3 blackjack

Perfect Pairs 21 3 Blackjack is an exciting variant of traditional blackjack that combines the classic game with additional side bets. This hybrid offers players the chance to win big with unique betting options, making it a favorite among both casual and seasoned blackjack enthusiasts. In this guide, we’ll explore the rules, strategies, and tips to help you master Perfect Pairs 21 3 Blackjack. Understanding the Basics Traditional Blackjack Before diving into Perfect Pairs 21 3 Blackjack, it’s essential to understand the basics of traditional blackjack.

Ad Disclosure

ALLTop Rated By UsersLatestPopular

Updated: -

• Lucky Ace Palace
  new

  

  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
• 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
• Starlight Betting Lounge
  

  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
• 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
• 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
• 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
• 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
• 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
• 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
• Royal Flush Lounge
  

  Opulent 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

perfect pairs 21 3 blackjack

Perfect Pairs 21 3 Blackjack is an exciting variant of traditional blackjack that combines the classic game with additional side bets. This hybrid offers players the chance to win big with unique betting options, making it a favorite among both casual and seasoned blackjack enthusiasts. In this guide, we’ll explore the rules, strategies, and tips to help you master Perfect Pairs 21 3 Blackjack.

Understanding the Basics

Traditional Blackjack

Before diving into Perfect Pairs 21 3 Blackjack, it’s essential to understand the basics of traditional blackjack. The goal is to beat the dealer by having a hand that is closer to 21 without going over. Players are dealt two cards, and they can choose to “hit” (draw another card) or “stand” (keep their current hand).

Side Bets in Perfect Pairs 21 3 Blackjack

Perfect Pairs 21 3 Blackjack introduces two exciting side bets:

1. Perfect Pairs: This side bet wins if the player’s first two cards form a pair. The payout varies depending on the type of pair:

   • Mixed Pair: A pair of the same value but different suits (e.g., a 7 of hearts and a 7 of clubs).
   • Colored Pair: A pair of the same value and same color (e.g., two 7s of hearts and diamonds).
   • Perfect Pair: A pair of the same value and suit (e.g., two 7s of hearts).

2. 21+3: This side bet wins if the player’s first two cards and the dealer’s up card form a specific poker-style hand. The possible winning combinations and their payouts are:

   • Suited Trips: Three cards of the same rank and suit (e.g., three 7s of hearts).
   • Straight Flush: Three consecutive cards of the same suit (e.g., 7, 8, 9 of hearts).
   • Three of a Kind: Three cards of the same rank (e.g., three 7s).
   • Straight: Three consecutive cards of any suit (e.g., 7 of hearts, 8 of clubs, 9 of diamonds).
   • Flush: Three cards of the same suit (e.g., 7 of hearts, 8 of hearts, 9 of hearts).

How to Play Perfect Pairs 21 3 Blackjack

Placing Bets

1. Main Bet: Place your bet on the main blackjack table.
2. Perfect Pairs Bet: Place an additional bet on the Perfect Pairs area if you want to participate in this side bet.
3. 21+3 Bet: Place another additional bet on the 21+3 area if you want to participate in this side bet.

Gameplay

1. Initial Deal: The dealer deals two cards to each player and two cards to themselves (one face up, one face down).
2. Perfect Pairs Evaluation: If you placed a Perfect Pairs bet, the dealer will evaluate your first two cards to determine if you have a pair.
3. 21+3 Evaluation: If you placed a 21+3 bet, the dealer will evaluate your first two cards and the dealer’s up card to determine if you have a winning poker-style hand.
4. Blackjack Play: Proceed with the traditional blackjack gameplay, making decisions to hit, stand, double down, or split as you normally would.

Strategies and Tips

Perfect Pairs Strategy

• Mixed Pair: Since mixed pairs are the least valuable, consider placing smaller bets on this outcome.
• Colored Pair: Colored pairs offer a higher payout than mixed pairs but are less likely to occur. Adjust your bet size accordingly.
• Perfect Pair: Perfect pairs offer the highest payout but are the rarest. Only place significant bets if you’re feeling lucky.

21+3 Strategy

• Suited Trips and Straight Flush: These are the highest paying combinations but are also the rarest. Only place large bets if you’re confident in your luck.
• Three of a Kind and Straight: These combinations offer decent payouts and are more likely to occur than suited trips and straight flushes. Consider placing moderate bets.
• Flush: Flushes are the most common winning combination in 21+3. Place smaller bets to maximize your chances of winning.

General Blackjack Strategy

• Basic Strategy: Stick to the basic blackjack strategy to improve your chances of winning the main bet.
• Bankroll Management: Manage your bankroll effectively by setting limits for your bets and side bets.
• Know When to Walk Away: If you’re on a losing streak, it’s wise to walk away and come back another time.

Perfect Pairs 21 3 Blackjack offers a thrilling twist to the classic game, providing players with additional opportunities to win big through side bets. By understanding the rules, employing effective strategies, and managing your bankroll, you can enhance your gaming experience and increase your chances of success. Whether you’re a seasoned blackjack player or a newcomer, Perfect Pairs 21 3 Blackjack is a game worth exploring.

blackjack perfect pairs 21 3

Blackjack is one of the most popular casino games, known for its simplicity and strategic depth. Over the years, various side bets and variations have been introduced to add more excitement and complexity to the game. Two such popular side bets are Perfect Pairs and 21+3. In this article, we will explore these side bets, how they work, and what strategies can be employed to maximize your chances of winning.

Perfect Pairs

What is Perfect Pairs?

Perfect Pairs is a side bet in blackjack that focuses on the initial two cards dealt to the player. The bet is based on the assumption that these two cards will form a pair. There are three types of pairs that can be formed:

• Mixed Pair: A pair of the same rank but different suits (e.g., a 7 of hearts and a 7 of clubs).
• Colored Pair: A pair of the same rank and the same color but different suits (e.g., a 7 of hearts and a 7 of diamonds).
• Perfect Pair: A pair of the same rank and the same suit (e.g., a 7 of hearts and another 7 of hearts).

Payouts

The payouts for Perfect Pairs vary depending on the type of pair formed:

• Mixed Pair: Typically pays 5:1.
• Colored Pair: Typically pays 10:1.
• Perfect Pair: Typically pays 30:1.

Strategy

While Perfect Pairs is a fun side bet, it is important to remember that it is a game of chance and does not affect the main blackjack game. The house edge for Perfect Pairs is relatively high, so it is advisable to bet small amounts and only occasionally.

21+3

What is 21+3?

21+3 is another popular side bet in blackjack that combines elements of poker with traditional blackjack. The bet is based on the player’s first two cards and the dealer’s upcard. The goal is to form a poker-style hand with these three cards.

Hand Combinations

The possible hand combinations in 21+3 are:

• Suited Trips: Three cards of the same rank and suit (e.g., three Aces of spades).
• Straight Flush: Three cards of the same suit in sequence (e.g., 7, 8, 9 of hearts).
• Three of a Kind: Three cards of the same rank but different suits (e.g., three Kings).
• Straight: Three cards in sequence but of different suits (e.g., 5, 6, 7 of different suits).
• Flush: Three cards of the same suit but not in sequence (e.g., 2, 5, 9 of clubs).
• Pair: Two cards of the same rank (e.g., two Queens).

Payouts

The payouts for 21+3 vary depending on the hand formed:

• Suited Trips: Typically pays 100:1.
• Straight Flush: Typically pays 40:1.
• Three of a Kind: Typically pays 30:1.
• Straight: Typically pays 10:1.
• Flush: Typically pays 5:1.
• Pair: Typically pays 1:1.

Strategy

Similar to Perfect Pairs, 21+3 is a side bet with a relatively high house edge. It is recommended to bet small amounts and only occasionally. The key to enjoying this side bet is to treat it as an additional form of entertainment rather than a primary source of winnings.

Combining Perfect Pairs and 21+3

Can You Play Both?

Yes, many blackjack tables allow players to place both Perfect Pairs and 21+3 side bets simultaneously. This can add an extra layer of excitement to the game, but it is important to manage your bankroll carefully.

Tips for Playing Both

• Set a Budget: Determine how much you are willing to spend on side bets and stick to it.
• Know the Odds: Understand the house edge for each side bet and be aware of the potential payouts.
• Enjoy the Game: Treat side bets as a form of entertainment rather than a guaranteed way to win money.

Perfect Pairs and 21+3 are exciting side bets that can add an extra dimension to your blackjack experience. While they offer the potential for high payouts, it is crucial to approach them with a clear understanding of the odds and a disciplined betting strategy. By doing so, you can enjoy these side bets responsibly and enhance your overall blackjack experience.

perfect pairs blackjack: win big with 21+3 side bet strategy

Introduction to Perfect Pairs Blackjack

Perfect Pairs Blackjack is an exciting variation of the classic card game that introduces a thrilling twist with its side bets. This version not only allows players to aim for the traditional 21 but also offers additional opportunities to win through unique combinations and pairings of cards. One such side bet that has gained popularity is the 21+3 side bet strategy.

Understanding the 21+3 Side Bet

What is 21+3?

The 21+3 side bet is based on the first two cards dealt to the player and the dealer’s upcard. The goal is to form a poker-style hand with these three cards. The possible outcomes and their payouts are as follows:

• Flush: All three cards of the same suit.
• Straight: Three cards in sequential order (e.g., 7-8-9).
• Three of a Kind: Three cards of the same rank.
• Straight Flush: Three cards in sequential order and of the same suit.
• Suited Three of a Kind: Three cards of the same rank and suit.

Payouts for 21+3

• Flush: 5 to 1
• Straight: 10 to 1
• Three of a Kind: 30 to 1
• Straight Flush: 40 to 1
• Suited Three of a Kind: 100 to 1

Combining Perfect Pairs with 21+3

How to Play

1. Place Your Bets: Start by placing your main bet on the blackjack table.
2. Side Bet: Optionally, place a side bet on the 21+3 area of the table.
3. Deal: Receive your first two cards and observe the dealer’s upcard.
4. Evaluate: Determine if your three cards form any of the winning poker hands.
5. Play Blackjack: Continue playing the main game as usual, aiming for 21 or as close to it as possible.

Strategic Considerations

• Bankroll Management: Ensure you have a sufficient bankroll to cover both the main bet and the side bet.
• House Edge: Be aware of the house edge for both the main game and the side bet. The 21+3 side bet typically has a higher house edge compared to the main game.
• Risk vs. Reward: Weigh the potential rewards of the 21+3 side bet against the risks. The higher payouts come with a higher probability of losing the side bet.

Tips for Maximizing Your Wins

Focus on the Main Game

• Basic Strategy: Stick to basic blackjack strategy to improve your chances of winning the main game.
• Card Counting: If you are skilled in card counting, use this technique to gain an edge over the house.

Leverage the Side Bet

• Patience: Wait for favorable situations where the odds of hitting a strong poker hand are higher.
• Observation: Pay attention to the cards that have been dealt and those remaining in the deck to make informed decisions.

Perfect Pairs Blackjack, combined with the 21+3 side bet strategy, offers a dynamic and potentially lucrative gaming experience. By understanding the rules, managing your bankroll, and making strategic decisions, you can enhance your chances of winning big. Whether you are a seasoned blackjack player or a newcomer, this variation adds an exciting layer of complexity and reward to your gaming sessions.

perfect pairs 21 3 blackjack

Introduction

Perfect Pairs 21+3 Blackjack is an exciting variant that combines the classic gameplay of blackjack with the thrill of side bets. This hybrid game offers players the chance to win additional payouts through two distinct side bets: Perfect Pairs and 21+3. Let’s delve into the mechanics and strategies that make this game a favorite among both casual and seasoned players.

The Basics of Blackjack

Standard Blackjack Rules

• Objective: Beat the dealer by having a hand value closer to 21 without exceeding it.
• Card Values:
  • Number cards (2-10) are worth their face value.
  • Face cards (J, Q, K) are worth 10.
  • Aces can be worth 1 or 11, depending on which value benefits the player more.
• Gameplay:
  • Players place their bets.
  • Each player receives two cards, face up. The dealer receives one card face up and one face down.
  • Players can choose to “hit” (draw another card), “stand” (keep their current hand), “double down” (double their bet and receive one more card), or “split” (if they have a pair, split into two hands).
  • The dealer reveals their face-down card and draws additional cards according to predefined rules.

Perfect Pairs Side Bet

How It Works

• Objective: Predict whether your first two cards will form a pair.
• Types of Pairs:
  • Mixed Pair: Two cards of the same value but different suits (e.g., a 10 of hearts and a 10 of clubs).
  • Colored Pair: Two cards of the same value and the same color (e.g., a 10 of hearts and a 10 of diamonds).
  • Perfect Pair: Two cards of the same value and the same suit (e.g., a 10 of hearts and another 10 of hearts).
• Payouts:
  • Mixed Pair: Typically pays 5:1.
  • Colored Pair: Typically pays 10:1.
  • Perfect Pair: Typically pays 30:1.

Strategy Considerations

• Probability: The odds of getting a pair are relatively low, so this bet is considered a gamble.
• Bankroll Management: Since the payouts are high, it’s advisable to wager a small percentage of your total bankroll on this side bet.

21+3 Side Bet

How It Works

• Objective: Predict whether your first two cards and the dealer’s face-up card will form a specific poker-style hand.
• Possible Hands:
  • Suited Trips: Three cards of the same rank and suit (e.g., three Aces of spades).
  • Straight Flush: Three consecutive cards of the same suit (e.g., 7, 8, 9 of hearts).
  • Three of a Kind: Three cards of the same rank but different suits (e.g., three Kings).
  • Straight: Three consecutive cards of different suits (e.g., 5, 6, 7 of different suits).
  • Flush: Three cards of the same suit (e.g., 2, 4, 6 of clubs).
• Payouts:
  • Suited Trips: Typically pays 100:1.
  • Straight Flush: Typically pays 40:1.
  • Three of a Kind: Typically pays 30:1.
  • Straight: Typically pays 10:1.
  • Flush: Typically pays 5:1.

Strategy Considerations

• Probability: The odds of forming a strong poker hand are low, making this bet a high-risk, high-reward option.
• Bankroll Management: Similar to Perfect Pairs, it’s wise to wager conservatively on this side bet.

Combining Both Side Bets

Gameplay Dynamics

• Simultaneous Bets: Players can place both Perfect Pairs and 21+3 bets simultaneously, adding an extra layer of excitement to the game.
• Decision-Making: The presence of side bets can influence players’ decisions on whether to hit, stand, or double down, as they may aim to achieve specific outcomes for their side bets.

Strategy Tips

• Focus on Main Game: While side bets add excitement, the primary objective remains beating the dealer in the main blackjack game.
• Balanced Approach: Allocate a portion of your bankroll to side bets while ensuring you have enough for the main game to maximize your overall enjoyment and potential winnings.

Perfect Pairs 21+3 Blackjack offers a unique blend of classic blackjack gameplay and innovative side bets. By understanding the mechanics and strategies behind Perfect Pairs and 21+3, players can enhance their gaming experience and potentially boost their winnings. Whether you’re a blackjack enthusiast or a newcomer to the game, this variant provides a thrilling and rewarding option for all.

Frequently Questions