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Sagot :
Answer:
7. A 1
8. C 17
9. B 2
10. (d) C and D
11. (b) reactivity
12. (a) corrosion
13. (c) activity series
Explanation:
7. , 8, and 9,
Group 1 elements are named as alkali metals
Group 2 elements are known as alkaline earth metals
group 17 metals are known as halogens
10.
Na and Xe have one valency whereas the other two elements have variable valency which is a property of transition metals so the answer is (d) C and D
11.
It;s the definition of reactivity
12.
Definition of corrosion
13.
definition of activity series
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