Connecting Chemistry

Phosphorus

Atomic symbol: P
Atomic number: 15
Atomic mass: 30.97

Appearance: Either a white or red solid at 25°C

Group: 15
Period: 3
Series: Reactive nonmetal
Block: p
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p³

Highly reactive, never found as a free element.

Exists most commonly as either white phosphorus or red phosporus.

Fun Fact! Red phosphorus coats the sides of matchboxes and tips of matches.

https://sciencenotes.org/phosphorus-facts/