Jak wymówić "atomic number 2"

• "atomic number 2" wymawiana po Angielski.

Znaczenie i definicje "atomic number 2"

Noun

a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)

Synonimy:

• helium
• He
• atomic number 2