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Standard IX

Chemistry

Octet Rule

The electroni...

Question

The electronic configuration of elements A, B, C, D and E are :
A (2, 8, 7) B (2, 8, 1) C (2) D (2, 6) E(2, 8)
Which of the above element/s are inert?

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C & E

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Solution

The correct option is D C & E
Element C has only one shell with 2 electrons in it, and E has complete octet . That means the outermost shell is complete hence the element is stable and inert.

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Similar questions

The electronic configurations of atoms of three elements A. B and C are (2, 8, 1), (2, 8, 6) and (2, 8, 18, 7) respectively.
Which option classifies the elements A. B and C as metals and non-metals correctly?

Q. Element 'A' has electronic configuration

2, 7,

'B' has configuration

2, 8, 6,

'C' has configuration

2, 8, 8

while 'D' has

2, 8, 7.

Which element will show similar chemical properties?

Q. The electronic configuration of two elements

X

and

Y

are given below:

X = 2, 8, 2

Y = 2, 8, 7

The formula of a compound that can be formed between these two elements is:

Q. Elements with configuration 2, 8, 2 and 2, 7 are placed in modern periodic table. Find out:
1. the valency of the elements mentioned above.
2. the period and group of the above elements.

Q. The electronic configurations of the elements

X, Y, Z

and

J

are given below. Which element has the highest metallic character?

X = 2, 8, 4

Y = 2, 8, 8

Z = 2, 8, 8, 1

J = 2, 8, 8, 7

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The electronic configuration of elements A, B, C, D and E are :A (2, 8, 7) B (2, 8, 1) C (2) D (2, 6) E(2, 8)Which of the above element/s are inert?

The correct option is D C & EElement C has only one shell with 2 electrons in it, and E has complete octet . That means the outermost shell is complete hence the element is stable and inert.

The electronic configuration of elements A, B, C, D and E are :
A (2, 8, 7) B (2, 8, 1) C (2) D (2, 6) E(2, 8)
Which of the above element/s are inert?

The correct option is D C & E
Element C has only one shell with 2 electrons in it, and E has complete octet . That means the outermost shell is complete hence the element is stable and inert.