Question

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Answer 1

Answer:

Q 1. Element A and Element M belong to the same group.

Explanation:

Because the atomic no. of first element is 13 and the second element is 5

And 5+8=13

We know that two corresponding elements of a group differs by 8 in atomic no.

Hope it helps :)

Answer 2

₁₃A²⁷ -- 1s² 2s² 2p⁶ 3s² 3p¹

₇B¹⁵  -- 1s² 2s² 2p³

₅M¹⁰ -- 1s² 2s² 2p¹

₁₁Q²³ -- 1s² 2s² 2p⁶ 3s¹

(i) A and M belong to same group because their electron configuration are same at outer shell. 1 electron in p orbital.

(ii) B belong to 2nd period as it has two shell.

(iii) number of neutrons in 'Q'= 23-11 = 12

(iv) B is a non metal.