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Which of the following is not the characteristic of barium?

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It emits electrons on exposure to light

It forms $Ba {({NO}_{3})}_{2}$ which is used in preparation of green fire

It is a silvery white metal

Its ionization potential is lower than radium

answer is A.

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Detailed Solution

Barium orbital is totally filled, making electron removal challenging. Thus, when exposed to light, it does not emit electrons.

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