Question

Let mass of electron is half, mass of proton is two times and mass of neutron is three fourth of original. Fnd out new atomic wt. of $O^{16}$ atom.

• A. Increases by 37.5%
• B. Remain constant
• C. Increases by 12.5%
• D. Decreases by 25%

Answer 1

The correct option is A Increases by 37.5%

P N A
8 + 8 = 16
$\downarrow$ $\downarrow$ $\downarrow$ + 6 $\frac{6}{16}\times 100=37.5\%$
2 x 8 =16 + (3/4)8=6 = 22

Hence, the correct option is $A$