In beta-minus decay, a neutron is converted into a proton, increasing the number of protons and a corresponding increase in the atomic number of the element, while the mass number remains unchanged.
Thus, the new nucleus has one more proton than the original.
جب ایک نیوکلئس سے دو منفی بیٹا ذرات خارج ہوتے ہیں تو ماس نمبر _____؟
A. Increases by 3
B. None of these
C. Increases by 2
D. No change
Explanation
The emission of two negative beta particles (electrons) does not affect the mass number since it involves the conversion of neutrons to protons without changing the total number of nucleons.
The mass number remains unchanged because the emission of beta particles only affects the atomic number, not the mass number.
