Give a general description of hydrogen.

The serial number of hydrogen in the periodic system is No. 1. From this it follows that the charge of the nucleus of the hydrogen atom is “+1”, the total number of electrons in the hydrogen atom is also 1, with the charge “-“.

Hydrogen is in the first period, from this it follows that there is only one energy level, where this electron is located.

Since there are only two atoms in the first period, the energy level is considered complete if there are two electrons on it (max). Consequently, the hydrogen atom must take one electron from another atom, or donate its only electron.

Ar (N) = 1