How will ions combine to form compounds?

describe the difference between an element and a compound.

a compound is a chemical change when it combines with something, like baking cookies. ions will combine to form compounds by chemically changing into another substance. a way you can identify a chemical change is by a change in color, formation of precipitate, formation of gas, odor change and change in tempature.

it is the most commonly accepted one

c. orbital shape i hope this is correct