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5. shows the electric charge gained or lost by that element when it forms a compound
6. molecules made of the same atoms
9. shared electrons evenly
12. unequal distribution of electric charge
15. compound made from two elements
16. a group of covalently bonded atoms that together have gained or lost electrons
19. shared electrons unevenly
20. attraction between metal atoms and their sea shared electrons

1. shortened way of identifying a chemical compound
2. transfer from metal to nonmetal where non metal will always win
3. an electrostatic attraction that forms between atoms when they share or transfer valence electrons
4. share electrons
7. smallest ratio of the ions in the unit
8. simple covalent bond model
10. positive ion
11. stuff in carbonated drinks
13. negative ion
14. toxic gas
17. stable when they have a full eight electrons in their valence energy level
18. opposite attract