What are at least 3 things in your life that involve chemistry and why do you think they do?

1. Mixing of condiments, water and other ingredients to cook something delicious. In this case, the proportions of those components matter in creating the food.2. Selling things based on precursors and determining the limiting reactant so as to maximize profit. 3. Buying stuffs and analyzing their ingredient content.

Ions gain or lose electrons