Question

omulii Caton
217 electionic configuration of your
element are given in the table fora
ther element in the increasing order
of their electoraagtively Give reason
elements electronic configuration
2.8.1
28.6
At
2,8,3
19
2,8.8
Na​

Answer 1

Answer:

2,8,1

2,8,3

2,8,6

2,8,8

This is the order of increasing electronegativity

as on moving left to right in a period the tendency to gain electrons increases due to increase in effective nuclear charge.

Answer 2

Explanation:

A) 1s

2

2s

2

2p

6

: Total electrons =2+2+6=10 Its a completely filled electronic cofiguration i.e. group 18 element Neon. This element has positive electron gain enthalpy.

(B) 1s

2

2s

2

2p

4

: The electronic configuration is for group 16 element i.e. oxygen. This elementhas high negative electron gain enthalpy.

(C) 1s

2

2s

2

2p

6

3s

1

: The electronic configuration is for group 1 element i.e. Sodium. This element has low negative electron gain enthalpy.

(D) 1s

2

2s

2

2p

5

: The electronic configuration is for group 17 element i.e. Fluorine. This element has highest negative electron gain enthalpy among the given configurations.

Thus increasing order of elelctron gain enthalpies for the given configurations is:

A<C<B<D

November 22, 2019

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