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- Tell me? Which of the following atoms has the highest first ionization energy ?
Which of the following atoms has the highest first ionization energy ?
- Option 1)
Rb
- Option 2)
Na
- Option 3)
K
- Option 4)
Sc
Answers (1)
As we learnt in
Ionisation energy of noble gas -
Very high and decreases down the group
- wherein
He
Alkali metals have very low ionization energies because they have only one valence electron to dose before attaining noble gas configuration.
So, scandium is the only element that is not in the first group and has the highest I.E among all.
Option 1)
Rb
This option is incorrect.
Option 2)
Na
This option is incorrect.
Option 3)
K
This option is incorrect.
Option 4)
Sc
This option is correct.
View full answer
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