question_answer

The first \[(I{{E}_{1}})\]and second\[(I{{E}_{2}})\]ionization energies\[\text{(kj/mol)}\]of a few elements designated by Roman numerals are given below. Which of these would be an alkali metal?

A) \[_{\text{I}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{\text{2372}}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{\text{5251}}^{\text{I}{{\text{E}}_{\text{2}}}}\]

B) \[_{\text{II}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{520}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{7300}^{\text{I}{{\text{E}}_{\text{2}}}}\]

C) \[_{\text{III}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{900}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{1760}^{\text{I}{{\text{E}}_{\text{2}}}}\]

D) \[_{\text{IV}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{1680}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{3380}^{\text{I}{{\text{E}}_{\text{2}}}}\]