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1. C

2. A

3. A & B

4. C

5. C

6. A

7. A

8. A & C

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1. C

2. A

3. A & B

4. C

5. C

6. A

7. A

8. A & C

Explanation:

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For metals, reactivity increases down a group and from right to left across a period. Nonmetals do the opposite. For nonmetals, reactivity increases up a group and from left to right across a period. Francium is the most reactive metal, and fluorine is the most nonmetal.