MCQ
An element $M$ has an atomic mass $19$ and atomic number $9$. Its ion is represented by
- A${M^ + }$
- ✓${M^ - }$
- C${M^{2 + }}$
- D${M^{2 - }}$
✓
Answer
Correct option: B.
${M^ - }$
b
$(b)$ ${M^ - }$ After gaining an ${e^ - }$ the metal attains stable configuration.
$(b)$ ${M^ - }$ After gaining an ${e^ - }$ the metal attains stable configuration.
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