Elements
Helium.
Helium is an element- the second one in the periodic table.
Water has no helium (He) atom. Chemically water is H2O and there is no He atom present in water.
an isotope of the element helium is obtained.
ATOM
Helium has 2 valence electrons.
Elements are not species. Helium is an element. Helium can be a single atom.
Helium is an element because it contains only one atom in its simplest form.
Helium is an element- the second one in the periodic table.
If HE was a compound it would be a compound of H (hydrogen) and E (sorry there is no such element).If HE is an element then it is misspelled and should be He (helium).
Water has no helium (He) atom. Chemically water is H2O and there is no He atom present in water.
No water is NOT an "atom". No water is NOT an "element".
Helium itself is an element and it forms no chemical compound whatsoever, therefore, it is a noble gas. The atom of Helium is so inert that it cannot even form a molecule with another atom of Helium, hence is monoatomic.
an isotope of the element helium is obtained.
ATOM
"Atom" implies there's only one there. If there were more than one atom, you'd have a compound. Since helium's an element, all that's in it is helium.
Helium is a non metal element. There are 2 electrons in a single atom.
Helium has 2 valence electrons.