How to determine group number and period from qtomic number?
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To determine period,
We will consider the shell (N) in which the Valence electrons are present.
For Ex,
An element X has configuration 1s² 2s² 2p³ and we have to determine its period??
Ans->. By configuration we can say that
X is nitrogen.
And has its Valence electrons in
shell (N) = 2.
hence it belongs to 2nd period.
We will consider the shell (N) in which the Valence electrons are present.
For Ex,
An element X has configuration 1s² 2s² 2p³ and we have to determine its period??
Ans->. By configuration we can say that
X is nitrogen.
And has its Valence electrons in
shell (N) = 2.
hence it belongs to 2nd period.
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