Which of the following statements is/are inco | vedclass

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(B, D) Statement $A$: The increase in atomic size from $Li$ to $Na$ is significant due to the addition of a new shell,but the increase from $Na$ to $K

Vedclass · Accepted Answer

The reaction $O_{(g)} + e^- 	o O^-_{(g)}$ is endothermic.

Vedclass · Answer

(B, D) Statement $A$: The increase in atomic size from $Li$ to $Na$ is significant due to the addition of a new shell,but the increase from $Na$ to $K$ is also large. However,the statement is generally considered correct in the context of periodic trends.Statement $B$: The electronic configuration of $P$ is $[Ne] 3s^2 3p^3$. Since the $3p$ subshell is half-filled,it is stable. Adding an electron to $P$ requires energy,making the process endothermic,not exothermic. Thus,this statement is incorrect.Statement $C$: The $IP$ (Ionization Potential) of $F$ is $1681 \ kJ/mol$,while its $EA$ (Electron Affinity) is $328 \ kJ/mol$. Thus,$IP > EA$ is correct.Statement $D$: The addition of the first electron to an oxygen atom is exothermic,but the addition of the second electron to form $O^{2-}$ is endothermic. The reaction $O_{(g)} + e^- 	o O^-_{(g)}$ is exothermic. Therefore,the statement as written is incorrect.

Which of the following statements is/are incorrect?

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Select the incorrect statement about these elements.

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