What will be the differents in the mass number the number is halved and the number of electrons is doubled in `_(8)O^(16)`?

Options

A. `25%` decreases
B. `90 %` increases
C. `150 %` increases
D. No difference

Explanation

`._(8)O^(16)` initial weight final weight
`{:("Protons",8p , rarr ,8p),("Neutrons",8n , rarr,4n),("Weight" , 16,rarr, 12):}`
Thus decreases in mass number `= 25%`