Question

42. Which of the following elements does not exhibit electrovalency?
(a) calcium
(b) chromium
(c) carbon
43. The number of valence electrons in a graphite atom is:
(a) 2
(b) 4
(c) 3
44. The atomic numbers of four elements A, B, C and D are 12, 13, 15 an
cannot form a cation is :
(a) A
(b) B
(c) C
45. The number of valence electrons in a sulphide ion, S2-, is :
(a) 16
(b) 10
(c) 9
46. For an element, Z = 9. The valency of this element will be:​

Answer 1

Answer:

42. Which of the following elements does not exhibit electrovalency?

(a) calcium

✔✅(b) chromium

(c) carbon

43. The number of valence electrons in a graphite atom is:

(a) 2

✅✔(b) 4

(c) 3

44. The atomic numbers of four elements A, B, C and D are 12, 13, 15 an

cannot form a cation is :

(a) A

✅✔(b) B

(c) C

45. The number of valence electrons in a sulphide ion, S2-, is :

✅✔(a) 16

(b) 10

(c) 9

46. For an element, Z = 9. The valency of this element will be:

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