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ICSE Class 9 Chemistry Question 27 of 39

Atomic Structure and Chemical Bonding — Question 39

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Question

Question 25

Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one :

(a) forms an anion

(b) forms a cation

(c) has four electrons in its valence shell?

Answer

(a) Y (2, 7) forms an anion.

(b) Z (2, 8, 2) forms a cation.

(c) X (2, 4) has four electrons in the valence shell.