B is the correct answer 9.0122
Physical<span> changes involve a new </span>form<span> or shape of matter,
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Chemical change<span> is any </span>change<span> that results in the formation of new </span>chemical<span> substances.</span>
1. Silicon is in the same group and also has 4 valence electrons.
2. covalent
3. 1
4. Wood
6. 1s22s22p2
7. Covalent
Those questions were somewhat simple. Questions #5 and #8 I'm not certain of and if you have any kind of textbook or course material, it'd be beneficial to look at it. I hope you were able to figure out the answer to Question #4 was "Wood", otherwise your teacher must be slacking :P. I'll try to figure out the answers to #5 and #8 and let you know what I figured out.
Answer:
Cobalt chloride= D cobalt(111) chloride
