Se

Selenium

Atomic Number 34 · Pellets/shot

An essential trace element. Used in glass-making, photocells, and as a dietary supplement.

Atomic Mass

78.971 u

Category

Reactive Nonmetal

Phase (STP)

Solid

Density

4.809 g/cm³

Melting Point

221 °C

Boiling Point

685 °C

Electronegativity

2.55 (Pauling)

Atomic Radius

115 pm

Electron Configuration

[Ar] 3d10 4s2 4p4

Discovered

1817 — Jons Jacob Berzelius

Find Selenium Samples

Sample form: Pellets/shot

Luciteria Science

Premium element samples in acrylic cubes

Engineered Labs

Element collections and periodic table displays

Various element samples and collections

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