9 янв. 2020 г. · On the periodic table of elements, helium is element number 2 .

8 февр. 2016 г. · Helium is an element.When two or more elements come together to form a substance it is known as a compound. Is helium in a balloon an element? - Quora Is helium a pure substance or a mixture? - Quora Is gas inside a helium balloon a compound or an element? What other elements does helium usually mix with in ... - Quora Другие результаты с сайта www.quora.com

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...

26 сент. 2017 г. · Helium and Sodium are elements, Water and Salt are compounds, while Sedimentary Rock and Air are mixtures.

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 ... Helium-4 · Helium-3 · Category:Helium · Liquid helium

9 янв. 2020 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.

A sample of helium is made up of only a single type of atom. Hence, He is an element (option (e) is correct).

Chemical element, Helium, information from authoritative sources. Look up properties, history, uses, and more.

It's a mixture. There are three substances in the mixture. The red and yellow molecules represent two elements and there is also a compound that is made from ...