Hydrogen

The first element on the periodic table. Hydrogen without any neutrons is sometimes called protium; with one neutron, deuterium; with two, tritium.

Basic Information:
| Name: Hydrogen
| Symbol: H
| Number: 1
| State at STP: Gas
| Melting / Freezing Point: 14 K
| Boiling Point: 20 K

Two hydrogen atoms and one oxygen atom make a water molecule.

by Wilfredlam0418 December 20, 2024