H

Hydrogen

Atomic Number 1 · Gas ampule

The lightest and most abundant element in the universe. Makes up about 75% of all normal matter by mass.

Atomic Mass

1.008 u

Category

Reactive Nonmetal

Phase (STP)

Gas

Density

8.988e-05 g/cm³

Melting Point

-259.16 °C

Boiling Point

-252.87 °C

Electronegativity

2.2 (Pauling)

Atomic Radius

25 pm

Electron Configuration

1s1

Discovered

1766 — Henry Cavendish

Find Hydrogen Samples

Sample form: Gas ampule

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Premium element samples in acrylic cubes

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Element collections and periodic table displays

Various element samples and collections

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