An element emits 1 alpha particle,1 positron,and 3 beta particles.Its atomic number
A)decreases by 2.
B)decreases by 1.
C)stays the same.
D)increases by 1.
E)increases by 2.

Question

Quizplus · Accepted Answer

An alpha particle emission decreases the atomic number by 2, a positron emission increases it by 1, and each beta particle emission increases it by 1. Therefore, the net change is -2 + 1 + 3 = 2, which means the atomic number stays the same.

An Element Emits 1 Alpha Particle,1 Positron,and 3 Beta Particles