Helium is a chemical element; it has symbol He and atomic number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble ...

9 янв. 2020 г. · On the periodic table of elements, helium is element number 2 . Was this answer helpful? upvote 0.

Hint: Helium is a chemical element with the atomic number 2 and the symbol He. It is a colourless, odourless, tasteless, non-toxic, inert monatomic gas that ...

23 мая 2018 г. · On the periodic table of elements, helium is element number 2 , and so that should tell you that it's an element of course...

8 февр. 2016 г. · Helium is an element with atomic number 2. It is a non-toxic, colourless, tasteless, odourless, inert, monatomic gas. Is gas inside a helium balloon a compound or an element? Is helium a pure substance or a mixture? Is a helium atom also a molecule? Is helium in a balloon an element? Другие результаты с сайта www.quora.com