The Lewis definition gives us a wider view of what acids and bases are.

Here's how it works:

• Acids are things that can take in a pair of electrons.
• Bases are things that can give away a pair of electrons.

This idea means that even stuff we don't usually think of as acids or bases—like some gases—can now be included in these groups.

This is really useful for understanding how different chemicals work with each other.

Also, it helps us guess how reactions will happen in many different situations.