Consider the following ionization enthalpies of two elements 'A' and 'B'.

Element Ionization enthalphy $\left(kJ / mol\right)$

${1}^{st}$ ${2}^{nd}$ ${3}^{rd}$

A 899 1757 14847

B 737 1450 7731

Which of the following statements is correct?

Question

Consider the following ionization enthalpies of two elements 'A' and 'B'.

Element	Ionization enthalphy $\left(kJ / mol\right)$
	${1}^{st}$	${2}^{nd}$	${3}^{rd}$
A	899	1757	14847
B	737	1450	7731

Which of the following statements is correct?

Quantrex Academy · Accepted Answer

Correct answer: D. Both 'A' and 'B' belong to group-2 where 'B' comes below 'A'.

Both 'A' and 'B' belong to group-2, because the 3 rd ionization energy is very high, it means 3 rd electron gets removed from internal shell and where 'B' comes below 'A', because on moving from top to bottom in group the ionization energy decreases.

Consider the following ionization enthalpies of two elements 'A'...

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