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| Hydrogen
is a gas in group IA of the periodic table with atomic number 1, an atomic
weight of 1.008, and a density of 0.071. Hydrogen forms an hcp solid at
low temperatures, melting at - 259.2 C and boiling at - 252.7 C.
The atomic configuration of the atom is (1s)1, and it has an ionic radius of 0.208 nm. Three isotopes exist, hydrogen with one proton in the nucleus, deuterium with a proton and neutron, and tritium with one proton and two neutrons in the nucleus. |
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