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Which of the following noble gases has a...

Which of the following noble gases has a full shell(s) of electrons?

A

`He`

B

`Ne`

C

`Ar`

D

Both (1) and (2)

Text Solution

Verified by Experts

The correct Answer is:
4
In helium `(1s^(2))` ,K shell of electrons is full while in neon `(1s^(2)2s^(2)2p^(6))`, both `K` and `L` shells are electrons are full. In other noble gases inner shells are full but valence shell is not full though `s` and `p` subshells of the valence shell are full.
All the noble gases except He have a 'closed' eight-electron outer subshell configuration `(ns^(2) np^(6))`.
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Knowledge Check

  • Which of the following noble gases has the highest positive electron gain enthalpy value ?

    A
    Helium
    B
    Krypton
    C
    Argon
    D
    Neon

  • Which of the following noble gases has the maximum positive electron gain enthalpy?

    A
    `Xe`
    B
    `He`
    C
    `Kr`
    D
    `Ne`

  • Which of the followng noble gases has the highest positive electron gain enthalpy ?

    A
    Helium
    B
    Krypton
    C
    Argon
    D
    Neon