Identify each of the elements. H- Hydrogen, O-Oxygen, C- Carbon. The little number after the letter is the number of that element. H2O- 1 O and CO2- 2 O
<span>their identified by the number of protons they have in the nucleus which = their electrons. </span>
Valance electron are called
Actually elements aren’t called building blocks but it’s the atom. They are called that because you need two or more to form a molecule. So they are kind of like legos.
