# How many protons, electrons, and neutrons does Strontium-38 have?

Jan 12, 2016

Strontium has 38 protons (necessarily!), and 38 electrons (necessarily), and has generally 48, 49, or 50 neutrons depending on the isotope.

#### Explanation:

For strontium, $Z$ $=$ $38$. There are 38 positively charged particles in its nucleus. Because the element is neutral, there must be a corresponding number of electrons, negatively charged particles, orbiting the nucleus. It atomic mass is $87.62$ $g \cdot m o {l}^{-} 1$. ""^86Sr, ""^87Sr, ""^88Sr, isotopes are common. These isotopes MUST have 48, 49, or 50 neutrons respectively in the nuclei.