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Sagot :
C.5
Given:
Electron distribution: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹.
A number of electrons present in valence shell of penultimate Shell represents the group of elements.
For s block elements: No. of group=number of valence shell electron.
p block elements: no. of group= 2 + 10 + number of valence electrons.
d block elements: no. of group= number(n-1)d electrons + number of electrons in nth shell.
Here, the differential electron is in p orbital hence, it belongs to p block
No. of group= 2+ 10 + 3=15 i.e. 15th group or VA group.
Therefore, the correct option is B.
Learn more:
brainly.com/question/749030
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