MCQ
Which of the following statement is not correct for the element having electronic configuration $1{s^2},2{s^2}{p^6},\,3{s^1}$
- AIt is a monovalent electropositive
- BIt forms basic oxide
- ✓It is a non-metal
- DIt has low electron affinity
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At what value of $(n)$ given compound will not evolve $CO_2$ gas ?