Across
- 3. Type of chemical reaction in which energy exits out.
- 4. Only those electrons in the "outer"shell.
- 6. Last name of "father of periodic table".
- 7. "Charge" of ions that receive or get electrons.
- 9. Group number of group that tend to not bond with other atoms.
- 11. Picture with dots showing an atom's valence electron number.(3 words)
- 13. The horizontal (left to right) rows on periodic table.
- 16. Category of elements found inside the staircase.
- 17. The dense central part of the atom containing protons and neutrons.
- 18. The nucleus contains the protons and _________ in it.
- 19. Type of bonding that involves a metal transferring electrons to nonmetal.
Down
- 1. Type of bonding that involves atoms "sharing" electrons.
- 2. "Charge" of ions that lose or give up their electrons.
- 5. Type of chemical reaction in which energy is taken in.
- 8. The negatively charged subatomic particles in atom.
- 10. The vertical (up and down)columns on periodic table.
- 12. The top number in the periodic square: ________ number.
- 14. Category of elements that make up most of the periodic table.
- 15. The positively charged subatomic particles in the nucleus of the atom.
- 16. Bottom number in square adding protons and neutrons together.