Across
- 3. Cl belongs to the ________ family.
- 5. Protons + neutrons = ______________.
- 7. Na belongs to the _______ metals family.
- 8. In a _______ change, a new substance is made.
- 12. Smallest possible piece of an element.
- 13. Any particle that doesn't have a charge is ________.
- 15. Substance with one type of atom.
- 16. Inventor of the periodic table.
- 18. Substance with more than one type of atom.
- 20. A change where energy is released.
- 22. Element that forms a positive ion.
- 23. Element that forms a negative ion.
- 24. Negative particle outside the nucleus.
- 25. Elements like K and Na have symbols from their original ________ names.
Down
- 1. __________ electrons are in the outermost shell.
- 2. In a _______ change, no new substance is made.
- 4. Only family with a full valence shell.
- 6. Another word for an electron orbital.
- 9. Atom or molecule with a charge.
- 10. A ________ compound does not contain ions.
- 11. A change where energy is absorbed.
- 14. Positive particle in the nucleus.
- 17. An metal that can have more than one charge is _________.
- 19. Another name for a homogeneous mixture.
- 21. When you heat a substance it gains __________.