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) \[_{\text{IV}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{1680}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{3380}^{\text{I}{{\text{E}}_{\text{2}}}}\]
Correct Answer: B
Solution :
: II is the alkali metal.You need to login to perform this action.
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