1. Graded Warmup 1. Metals form positive ions
2. Nonmetals in group 15 have -3 charge
3. How many valence electrons are on each level after the first? 8
4. Na-O ionic
5. Li-F ionic
6. C-C covalent
7. N-F covalent
8. Usually soluble ionic
9. High melting point ionic/metallic
10. Free moving electrons metallic

2. Graded warm-up continued
11. share electrons equally nonpolar
12. molecules show a attraction polar
13. Water polar
14. PI3 look at your paper
15. H2Se look at your paper
16.Magnesium Iodide formula MgI2
17. KBr chemical name Potassium bromide
18. Aluminum sulfate formula Al2(SO4)3
19. BaCl2 chemical name Barium chloride
20. Ca(NO3)2 chemical name Calcium nitrate