What isotope has 2 neutrons and 2 protons?
A) ${ }_{4}^{2} \mathrm{Be}$
B) ${ }_{2}^{4} \mathrm{Be}$
C) ${ }_{4}^{2} \mathrm{He}$
D) ${ }_{2}^{4} \mathrm{He}$

Question

Quizplus · Accepted Answer

The correct isotope is ${ }_{2}^{4} \mathrm{He}$, which means it has 2 protons (the lower number) and a total atomic mass of 4, indicating it has 2 neutrons (4 total mass - 2 protons = 2 neutrons).

What Isotope Has 2 Neutrons and 2 Protons? A) 42Be{ }_{4}^{2} \mathrm{Be}42​Be

What Isotope Has 2 Neutrons and 2 Protons?
A) ${ }_{4}^{2} \mathrm{Be}$