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Subjects
Science CBSE
Class 9
Structure of the atom
Textbook questions
12.
Exercise XII
Exercise condition:
3
m.
If \(Z = 3\), what would be the valency of the element? Also, name the element.
Z \(=\) Atomic number \(=\) \(3\)
∴ Electronic configuration \(=\)
(\(2, 1\))
(\(2, 8\))
(\(2, 3\))
The electrons in the outermost shell \(=\)
3
8
1
, hence, valency \(=\)
3
8
1
The element with atomic number \(3\) is
helium
lithium
boron
.
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