nitrogen

carbon${\displaystyle \longleftarrow }$ 7 ${\displaystyle \longrightarrow }$oxygen

The Simple English Wikipedia has an article on:

Nitrogen

Pronunciation

• IPA ^(key): /ˈnaɪtrədʒən/

• Audio (US)

  (file)

• Hyphenation: ni‧tro‧gen

Noun

Singular nitrogen

Plural none

1. (uncountable) Nitrogen is a colourless gas that has an atomic number of 7 and the symbol N.

   The air we breathe is mostly made of nitrogen.

   Nitrogen does not react very easily.

   Liquid nitrogen is used to keep other things very cold.