Question

which symbol represents an alpha particle in nuclear equations?
a. $_ {-1}^0e$
b. $_ {0}^0gamma$
c. $_ {+1}^0e$
d. $_ {2}^4he$

Explanation:

An alpha - particle is a helium - 4 nucleus, which has 2 protons and 2 neutrons. Its symbol in nuclear equations is $_{2}^{4}\text{He}$. Option A represents an electron (beta - particle), option B represents a gamma - ray photon, and option C represents a positron.

Answer:

D. $_{2}^{4}\text{He}$