1. Atoms and Elements

2. Atoms are made of Subatomic Particles

3. Molecules are multiple atoms that are connected
Atom is just one

5. Atoms are not all the same!

9. How many Valence Electrons do theses atoms have?
Boron Atom

10. How many Valence Electrons do theses atoms have?

11. Ions

15. When an Atom gains or loses an electron it becomes an ION!
This Sodium ION is Positively charged because it lost 2 electrons.

16. This Chlorine ION is Negatively charged because it gained an electron.

17. Sharing electrons is called a covalent bond!

18. Sharing electrons is called a covalent bond!