‘A+2 ’ is isoelectronic with ‘CO2’ and has (Z+2) neutron (Z is atomic number of A), then the select the correct option(s).

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Chemistry

Electronic Configuration

Question

‘A⁺² ’ is isoelectronic with ‘CO₂’ and has (Z+2) neutron (Z is atomic number of A), then the select the correct option(s).

Number of unpaired electron in ‘A’ is 4

Last electron enters in ‘s’orbital in element ‘A’

During formation of A⁺² electron(s) are removed from ‘s’ as well as ‘d’ subshell.

Mass number of A⁺² is 50

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A⁺² have 22 electron
A has 24 electron / 24 p⁺

n⁰ = 26

(i) Mass number of A = 50
Atomic number is 24
3d⁵4s¹

(iv) A⁺² 1 electron is removed from s & 1 from d.