H
Hydrogen Symbol (H)
Hydrogen is element 1 of the periodic table. Copy its symbol H and see its atomic weight, electron configuration and common compounds.
What does H mean?
H is the chemical symbol for hydrogen, element number 1 in the periodic table. Hydrogen is a reactive nonmetal in group 1, period 1. It is the lightest and most abundant element in the universe; it forms water with oxygen and is the fuel of stars.
Codes and properties
| Chemical symbol | H |
|---|---|
| Atomic number (Z) | 1 |
| Standard atomic weight | 1.008 |
| Group / period | 1 / 1 |
| Element category | reactive nonmetal |
| Electron configuration | 1s¹ |
| Common compounds | H₂O, H₂, HCl, NH₃ |
How to type H
- Plain text: type
H— element symbols are ordinary Latin letters, with the first letter capitalised. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{H}in math mode, or use the mhchem package:\ce{H}. - HTML:
H; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for hydrogen?
The chemical symbol for hydrogen is H.
What is the atomic number of hydrogen?
Hydrogen has atomic number 1, meaning each atom has 1 proton.
What is the electron configuration of hydrogen?
The ground-state electron configuration of hydrogen is 1s¹.