I assume you mean energy levels/shells.
It has 1.
3
2
Helium atom has 2 electrons.
Helium has two neutrons and two protons in its nucleus.
Water has no helium (He) atom. Chemically water is H2O and there is no He atom present in water.
there are 2 protons in a helium atom there are 2 protons in a helium atom
depends on what column theyre in Ex: Lead (pb) is in column 6, the columns are how many rings the atom has
Helium atom has 2 electrons.
Helium has one kind of atom: helium.
Helium has two neutrons and two protons in its nucleus.
Water has no helium (He) atom. Chemically water is H2O and there is no He atom present in water.
2
Elements are not species. Helium is an element. Helium can be a single atom.
there are 2 protons in a helium atom there are 2 protons in a helium atom
depends on what column theyre in Ex: Lead (pb) is in column 6, the columns are how many rings the atom has
A helium atom consists of 2 protons, 2 electrons and 2 neutrons.
4
helium has 2 electrons as its atomic number is 2
Helium will have only 2 electrons