2 of each
A helium atom has 2 protons, 2 neutrons, and 2 electrons.
The normal helium atom has two protons and two neutrons in the nucleus, and two electrons in the "shell".
protons and nuetrons are equal to no. of electrons present in atom
Helium has two protons and two neutrons (and two electrons).
26 nuetrons, 22 electrons, and 22 protons
20 protons, 20 electrons, and usually 20 neutrons
Sc is a 3d element. It has 21 protons and 21 electrons.
12 , 12 , 12
Argon has 18 electrons and protons...Neutrons is 22
5 protons 8 neutrons try it
Oxygen has: 8 neutrons 8 protons (8 electrons)
One atom of helium contains 2 protons and 2 electrons. The most abundant isotope of helium, helium-4, has 2 neutrons. The other, rare isotope of helium, helium-3, has 1 neutron. (Source: Wikipedia)