MCQ
Nucleus of an element contains $9$ protons. It's valency would be
- ✓$1$
- B$2$
- C$3$
- D$5$
✓
Answer
Correct option: A.
$1$
a
As nucleus of the element contains nine protons, its atomic number is $9$. Hence, the electronic configuration of the element is $2, 7$. It needs one more electron to attain the stable inert gas configuration.
As nucleus of the element contains nine protons, its atomic number is $9$. Hence, the electronic configuration of the element is $2, 7$. It needs one more electron to attain the stable inert gas configuration.
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