Name: Occurrence of Noble Gases
Uploaded: 2019-07-19
Duration: 9 min 27 s
Description: Inert gases are also known as “noble” because they were assumed to be non-reactive since they have filled valence shells. Let’s see the video.

Question

Write the electronic configuration of elements group 18.

Accepted Answer

An element with 2 or 8 electrons in the outermost shell attains stability. The electronic configuration of group 18 elements is-

Helium: The electronic configuration is $1 s^{2}$ . Its outermost is completely filled and it has two electrons. Hence, it attains the stability. It follows duplet rule. It has one shell.

Neon: The electronic configuration is $[H e] 2 s^{2} 2 p^{6}$ . Its outermost shell is filled completely and it has eight electrons. It follows octet rule. It has two shells.

Argon: The electronic configuration is $[N e] 3 s^{2} 3 p^{6}$ . Its outermost shell is filled completely and it has eight electrons. It follows octet rule. It has three shells.

Krypton: The electronic configuration is $[A r] 3 d^{10} 4 s^{2} 4 p^{6}$ . Its outermost shell is filled completely and it has eight electrons. It follows octet rule. It has four shells.

Xenon: The electronic configuration is $[K r] 4 d^{10} 5 s^{2} 5 p^{6}$ . Its outermost shell is filled completely and it has eight electrons. It follows octet rule. It has five shells.

Radon:The electronic configuration is $[X e] 4 f^{14} 5 d^{10} 6 s^{2} 6 p^{6}$ . Its outermost shell is filled completely and it has eight electrons. It follows octet rule. It has six shells.

Element	Electronic configuration
H	1
Li	2, 1
Na	2, 8, 1
K	2, 8, 8, 1
Rb	2, 8, 18, 8, 1
Cs	2,8, 18, 18, 8, 1
Fr	2, 8, 18, 32, 18, 8, 1

Element	Electronic configuration
H	1
Li	2, 1
Na	2, 8, 1
K	2, 8, 8, 1
Rb	2, 8, 18, 8, 1
Cs	2,8, 18, 18, 8, 1
Fr	2, 8, 18, 32, 18, 8, 1

Element	Electronic configuration
H	1
Li	2, 1
Na	2, 8, 1
K	2, 8, 8, 1
Rb	2, 8, 18, 8, 1
Cs	2,8, 18, 18, 8, 1
Fr	2, 8, 18, 32, 18, 8, 1

Write the electronic configuration of elements group 18.

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