Across
- 4. this is in the middle of an atoms, Houses the protons and neutrons
- 5. These have a neutral charge, Housed in the nucleus
- 6. The subject that atoms and the periodic table fall into
- 8. What the atom weighs is the...
- 9. Has a positive electrical charge
- 10. House the electrons, outside of the nucleus
- 13. The positive or negative charge of an atom is this..
Down
- 1. The number of protons in an element is also this...
- 2. The outermost layer of the electron cloud
- 3. Everything is made up of this
- 7. The most stable elements on the periodic table, Have a full valence shell
- 11. These are all in the periodic table
- 12. Holds all of the known elements, created by Dimitri Mendeleev