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Q.

The first ionization energy of Neon is 2080.7 KJ/mole. The first ionization energy of He may be

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a

2372.3 KJ/mole

b

1520.5 KJ/mole

c

1800.4 KJ/mole

d

2080.7 KJ/mole

answer is B.

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Detailed Solution

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${IE}_{1}$ $Ne < He$

As size increases down the group ionization decreases

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The first ionization energy of Neon is 2080.7 KJ/mole. The first ionization energy of He may be