Question

Statement $1$: Element $Z$ with an electronic configuration of $1s^{2}2s^{2}2p^5$ can be expected to form the compound $Mg{Z}_2$.
Statement $2$: Each atom of $Z$ needs two electrons to fill its valence shell.

• A. Both Statement $1$ and Statement $2$ are correct and Statement 2 is the correct explanation of Statement $1$
• B. Both Statement $1$ and Statement $2$ are correct, but Statement $2$ is NOT the correct explanation of Statement $1$
• C. Statement $1$ is correct, but Statement $2$ is not correct
• D. Statement $1$ is not correct, but Statement $2$ is correct

Answer 1

Answer: (C)

Statement $1$ is correct, but Statement $2$ is not correct

Element Z has electronic configuration ${1s}^{2}2s^{2}2p^5$ , its belongs to 17th group so, it can form compound $Mg{Z}_2$.

Its valency will be one.

It requires 9 elctron to fill its valence shell or it has already 9 electrons. So, statement 2 is wrong.