Helium has two electrons.
You can tell from looking at the Periodic Table because; each element has the same number of electrons as protons (the number of protons is the atomic number, which increases in number as you move from left to right across the periodic table, starting with one at Hydrogen).
Helium has 2 electrons.
Helium atom has 2 electrons.
Helium-4 has 2 electrons.
Helium has 2 valence electrons.
2 electrons as the atomic number of helium is 2
Helium-3 has 1 neutron and 2 electrons. Helium-4 has 2 neutrons and 2 electrons.
2 valence electrons for helium (helium has only 1 shell)
A neutral atom of helium has 2 electrons.
2 electrons
2
helium has 2 electrons as its atomic number is 2
2 electrons in the only shell helium has.