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Among the following, the elements with even number of neutrons is

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By Expert Faculty of Sri Chaitanya
a
Na
b
Al
c
Ne
d
He

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detailed solution

Correct option is A

The formula for neutrons is n= A- Z

For Na 1123n=23-11=12

ForAl 1327n=27-13=14Even

ForNe 1020n=20-10=10(even)

For He 24n=4-2=2(Even)

Hence, all the options are correct.

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