helium

hydrogen${\displaystyle \longleftarrow }$ 2 ${\displaystyle \longrightarrow }$lithium

The Simple English Wikipedia has an article on:

Helium

Pronunciation

• enPR: hē'lēəm
• IPA ^(key): /ˈhiːlɪəm/
• SAMPA: /"hi:li@m/

• Audio (US)

  (file)

• Audio (US)

  (file)

• Hyphenation: he‧li‧um

Noun

Singular helium

Plural none

1. (uncountable) Helium is a colourless gas that has an atomic number of 2 and the symbol He.

   Sir, can you please fill my balloon up with helium, please?