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Q.

What will be the difference in the mass number if the number of neutrons is halved and the number of electrons is doubled  8O16?

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a

25% decrease

b

50% increase

c

150% increase

d

No difference

answer is A.

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Detailed Solution

8O16 Initial weight-final weight  Protons     8p    →    8p Neutrons     8n    →    4n Weight     16    →    12Thus decrease in mass number = 25%
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