Question

Atomic numbers of pairs of elements are given below. Identity the
pair which will form ionic bond ?
निम्न तत्व युग्मों के परमाणु क्रमांक दिये गये हैं। इनमें से कौन-सा युग्म
आयनिक बन्ध बनाएगा ?
(1) 15, 17
(2) 14, 9
(3) 17, 20
(4) 9, 16
​

Answer 1

oh .... c 17,20 is your answer let us check

17 atomic number belongs to.. ummm.....what.....it belongs to an element called chloorine

20 belongs to what...... it belongs to calcium and the ionic bond is formed to give you calcium chloride cacl2

Answer 2

Answer:

First thing that you need to keep in mind is that ionic bond is only formed when two elements share electrons amongst themselves.

Explanation:

So, lets look at the electronic configurations provided here….

(1) 15, 17

….   Element A has 15 (2, 8, 5) Element B has (2, 8, 7)

Here element A can share 1 electron with B to attain stability. So can form ionic bond.

(2) 14, 9

Element A has (2, 8, 4) while B has (2, 7) sharing one electron with A will offer B with stability.

(3) 17, 20

Element A has (2, 8, 7) while B has (2, 8, 8, 2)

For stability B requires only one electron….so ionic.

(4) 9, 16

Element A has (2, 7) while B has (2, 8, 6)

Cannot form ionic bond.