Periodex

General properties

Group

group 15 (pnictogens)

Period

period 2

Category

nonmetals

Standard atomic weight

14.007

[14.006 43, 14.007 28]

Melting point

(N₂) 63.15 K (-210.00 °C)

Boiling point

(N₂) 77.355 K (-195.795 °C)

Phase at STP

gas

Additional properties

Block

p-block

Electron configuration

[He] 2s² 2p³

Electrons per shell

2, 5

Electronegativity

3.04

Density

1.2506 g/L

Oxidation states

−3, −2, −1, +1, +2, +3, +4, +5 (a strongly oxide)

CAS Number

7727-37-9

Natural isotopes

Discovery history

Discovered by

Daniel Rutherford

Year of discovery

1772

Origin of name

The Greek 'nitron' and 'genes' meaning nitre-forming