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.

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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 $K$ 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?

Similar Questions

What is the basic difference between the terms electron gain enthalpy and electronegativity?

Which of the following order$(s)$ is/are correct?
$(1) Li < Be < B < C$ $(IE_1)$
$(2) Li < Na < K < Rb < Cs$ (Reducing power in gaseous state)
$(3) Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$ (Ionic mobility in aqueous solution)
$(4) S > Se > Te > O$ $(EA)$

Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?
$(a)$ Valence principal quantum number $(n)$
$(b)$ Nuclear charge $(Z)$
$(c)$ Nuclear mass
$(d)$ Number of core electrons.

Represent different types of periodic properties in the periodic table.

Which of the following represents the correct order of ionization enthalpy?
$(i) Ba < Sr < Ca$
$(ii) S^{2-} < S < S^{2+}$
$(iii) C < O < N$
$(iv) Mg < Al < Si$

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