Question

please answer this soon ​

Answer 1

I) At no = 7

∴ Group no : 15 (10 + no of Valence electrons)

   Period no : 2 (No of shells)

Well now 8&9 will be in series with 7 so..

II) A>B>C   (Atomic radius decreases from left to right within a period)

III) C is more reactive because it has highest electronegativity or can easily gain 1 electron as it's valency is only 1.

Hope it helps.

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Answer 2

(a) The Postion of A,B and C will be :

•Period : 2nd (2 SHELLS)

•Group : A- 15 (10+5)

B- 16 (10+6)

C- 17 (10+7)

(b) A>B>C

(c)C will be more reactive because it will readily accept 1 electron and fill its outermost shell.

Hope it helps....

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