Question

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Answer 1

Answer:

12. (C) either metals or non metal

13. (d) J.J.Thomson

14. (C) 7

15. (a)2,8,4

16. (B) (i)and(ii)

17. (C) An atom has equal number of protons and neutrons.

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Answer 2

Answer:

C

D

C

A

B

C

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