Question

2. In the following table, six elements A, B, C, D, E and F (here letters are not the usual
symbols of the elements) of the Modern Periodic Table with atomic numbers 3 to 18 are
given:
4
6
7
8
9
10
ED
G
13
14
15
16
17
18
C
D
(a) Which of these halogen ?is (i) a noble gas, (ii) a halogen
(b) If B combines with F, what would be the formula of the compound formed?
(c)Write the electronic configurations of C and E.
(d)Identify the element A
(e)What is the valency of D.
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Answer 1

Answer

(a) cholrine and fluorine (9) and (17)

(i) 2,10,and 18 (ii) 9 and 17

(b) chromium and nikel (I didn't get the question actually)

(c) C = 2,5

E = 2,7

(d) Beryllium

(e) - 2

I hope you got it and if you want clear answers then write each and everything of the question

In the last there's something you didn't complete it