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Q.

Which of the following elements has the lowest electron affinity?

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a

N

b

B

c

Be

d

Cl

answer is A.

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Detailed Solution

Because more electrons are added to energy levels, the nucleus and its electrons are drawn closer together, increasing the electron affinity upward for the groups and from left to right across periods on a periodic table.

Be comes most left, thus this elements has the lowest electron affinity.

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