The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here are not the chemical symbols of the elements):
(i) Which element has a bigger atom, a or ƒ ?
(ii)Which element has a higher valency, k or o?
(iii) Which element is more metallic, i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a letter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
Lakhmir Singh Chemistry Class 10
Answers
Answer:
Explanation:
The diagram for the same represents the table as -
a - 3 b - 4 c -5 d - 6 e - 7 f - 8 g - 9 h -10 i - 11 j- 12 k - 13 l - 14 m - 15 n - 16 o - 17 p - 18
(i) Element one has the larger atom. In the periodic table, the element's atomic radius reduces as it moves in a period from left to right.
(ii) k has a higher valency.
Electronic configuration of k : K L M - 2 8 3
Thus, the valency for k = valence electron of K = 3
Electronic configuration of o: K L M - 2 8 7
Thus the, valency for o = 8 - valence electron of o
= 8 - 7
= 1
(iii) Element I is more metallic since I belong to the periodic table's left side and group 1. The metallic character reduces when moving from left to right in a period.
(iv) Element g is more non-metallic, as the non-metallic character rises in a period when it moves from left to right.
(v) Elements b or j components are metals with a 2 valence as they have 2 valence electrons and are put on the left side of the periodic table.
(vi) The elements f or n are metals with a valency of 2 .
Electronic configuration of f : K L - 2 6
Valency of f = 8 - valence electron
= 8 - 6 = 2
Electronic configuration of n : K L M - 2 8 6
Valency of n = 8 - valence electron
= 8 - 6 = 2
Answer:
Explanation:
(i)element 1