Hydrogen is an element with atomic number (proton number) 1, meaning that it only has one proton in its nucleus. Since, atoms have no overall electrical charge there must be a balance between the positively charged protons and the negatively charged electrons. So, the number of protons and electrons are equal, 1 e-.
Atom is becoming ion by losing or gaining electrons. The most likely charge of the hydrogen ion is + (losing that one electron), because it isn’t that electronegative to gain one.