The alkaline earth metals \[Ba,\] \[Sr,\] \[Ca\] and \[Mg\] may be arranged in the order of their decreasing first ionisation potential as [CPMT 1990]

\[Mg,\] \[Ca,\] \[Sr,\] \[Ba,\]

\[Ba,\] \[Mg,\] \[Ca,\] \[Sr,\]

The alkaline earth metals \[Ba,\] \[Sr,\] \[Ca\] and \[Mg\] may be arr

1.	The alkaline earth metals \[Ba,\] \[Sr,\] \[Ca\] and \[Mg\] may be arranged in the order of their decreasing first ionisation potential as [CPMT 1990]
A.	\[Mg,\] \[Ca,\] \[Sr,\] \[Ba,\]
B.	\[Ca,\] \[Sr,\] \[Ba,\] \[Mg\]
C.	\[Sr,\] \[Ba,\] \[Mg,\] \[Ca\]
D.	\[Ba,\] \[Mg,\] \[Ca,\] \[Sr,\]
Answer» B. \[Ca,\] \[Sr,\] \[Ba,\] \[Mg\]

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The alkaline earth metals \[Ba,\] \[Sr,\] \[Ca\] and \[Mg\] may be arranged in the order of their decreasing first ionisation potential as [CPMT 1990]

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