What is the number of electrons, protons, and neutrons in deuterium?

To determine the number of electrons, protons, and neutrons in deuterium, we need to understand its atomic structure.

Deuterium is an isotope of hydrogen, which means it has the same number of protons but a different number of neutrons.

First, let's start with the number of protons. Hydrogen always has one proton, so deuterium also has one proton.

Next, let's determine the number of electrons. In a neutral atom, the number of electrons is equal to the number of protons. Therefore, deuterium also has one electron.

Finally, let's find the number of neutrons. Deuterium is an isotope of hydrogen with one neutron, while regular hydrogen has no neutrons. Therefore, deuterium has one neutron.

In summary, deuterium has 1 proton, 1 electron, and 1 neutron.