Chemistry Crossword

2. Atoms will always react when they have a full shell.
3. Has Hydrogen and Carbon in it.
5. The elements on the stair line.
9. the guy who made the periodic table
10. Total number of protons + neutrons.
16. The group to the right of the Transition Metals and to the left of the Metallloids.
17. Add mass to the atom.
18. Do not add mass to the atom
20. Most reactive non-metals.

1. The bottom group of the 2 that is usually under, and do not fit into, the Periodic Table.
4. Has Calcium and Barium.
6. thing that holds all of the elements
7. The letters of the elements.
8. Top group of the 2 that is usually under and do not fit into the Periodic Table.
11. Most reactive.
12. Will never change, because it will become a different element.
13. Tells the number of protons.
14. Do not react at all.
15. the study of the elements
19. an atom with an electric charge due to loss or gain of electrons