Across
- 3. what is a group in the periodic table called
- 5. what is the word to decribe number of protons
- 7. what happen if a atom grains a electron
- 8. what is the word uses to decribe same atomic number different atomic mass
- 9. what is the max number of atoms in the first shell
Down
- 1. what is a period in the periodic table
- 2. what is the brain of a atom
- 4. what happen if a atom loses a electron
- 6. what forms negative ions
- 8. what are charge participles