During the emission of a positron from a nucleus, the mass number of the daughter element remains the same but the atomic number

Question

During the emission of a positron from a nucleus, the mass number of the daughter element remains the same but the atomic number (A) is decreased by 1 unit (B) is decreased by 2 units (C) is increased by 1 unit (D) remains unchanged

Tardigrade Admin · Accepted Answer

When a positron is emitted, a proton is converted into neutron and neutrino. Thus, the number of protons and hence the atomic number decreases by one unit.

Proton_{1}^{1} H ⟶ Neutron_{0}^{1} n + Positron_{+ 1} e^{0} + Neutrino v

Q. During the emission of a positron from a nucleus, the mass number of the daughter element remains the same but the atomic number

is decreased by 1 unit

is decreased by 2 units

is increased by 1 unit

remains unchanged

When a positron is emitted, a proton is converted into neutron and neutrino. Thus, the number of protons and hence the atomic number decreases by one unit. Proton11​H​⟶Neutron01​n​+Positron+1​e0​+Neutrinov​

When a positron is emitted, a proton is converted into neutron and neutrino. Thus, the number of protons and hence the atomic number decreases by one unit.
$Proton_{1}^{1} H ⟶ Neutron_{0}^{1} n + Positron_{+ 1} e^{0} + Neutrino v$