H2 gas是甚麼物質?

Question

H2 gas是甚麼物質?

Answer 1

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Atomic Number: 1

Symbol: H

Atomic weight: 1.0079

Discovery: Cavendish, 1766. Hydrogen was prepared for many years before it was recognized as a distinct element.

Electron Configuration: 1s1

Word Origin: Greek: hydro, water; genes, forming Named by Lavoisier.

Isotopes: Protium (0 neutrons), Deuterium (1 neutron), and Tritium (2 neutrons)

Ground level: 2S1/2

Ionization potential: 13.5984 ev

Physical form: Colorless gas

Melting point: -259.2°C

Boiling point: -252.762°C

Critical temperature: -240.18°C

Density: 0.082 g/L

Source(s): chemistry.about.com

Answer 2

flammable gas