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Ba,Sr,Ca and Mg may be arranged in order...

Ba,Sr,Ca and Mg may be arranged in order of decreasing first ionisation energy `(IE_(1))` as :

A

Mg,Ca,Sr,Ba

B

Ca,Sr,Ba,Mg

C

Sr,Ba,Mg,Ca

D

Ba,Mg,Ca,Sr

Text Solution

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The correct Answer is:
A
`IE_(1)` decreases down the gorup because of increasing atomic size.
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DINESH PUBLICATION-S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS )-MCQB
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