Helium is the smallest and the lightest noble gas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist ...

8 февр. 2016 г. · Helium is a pure substance. Most commonly, helium gas is a mixture of 2 different forms of helium (isotopes). So in that sense it's not “pure”. Is gas inside a helium balloon a compound or an element? Is helium a pure substance or a mixture? - Quora What other elements does helium usually mix with in ... - Quora Why don't helium and argon have any compounds? - Quora Другие результаты с сайта www.quora.com

9 янв. 2020 г. · An element is a pure substance as well because if we fill up a balloon with just helium gas, it will only contain helium atoms.

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...

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. Was this answer ...

20 мар. 2018 г. · A new team of researchers has offered an explanation: Helium manages to combine with other atoms without making any chemical bonds.

it is an element and not a compound; it is the second most abundantly found gas on Earth after Hydrogen; it is named after the Sun or 'helios.'.

25 окт. 2024 г. · Helium, chemical element, inert gas of Group 18 (noble gases) of the periodic table. The second lightest element, helium is a colorless, ...