2 is the atomic number (or the number of protons) of helium.
4 is the mass number of helium (mass number = number of protons + number of neutrons)
The atomic number of Helium is 2.
Helium's atomic number is 2.
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
Helium is number two on the periodic table indicating that it has 2 protons.
4 is the mass number of helium (mass number = number of protons + number of neutrons)
The atomic number of Helium is 2.
Helium's atomic number is 2.
The atomic number of helium (He) is 2.
Atomic number 2 is Helium, which has the symbol He
The symbol of Helium is He. Helium's atomic number is 2.
Helium has 2 protons and 2 electrons.
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
Helium is number 2 on the Periodic Table, and the number of its mass is 4. So, therefore it has 2 protons, 2 neutrons, and 2 electrons !
Helium has 2 protons, 2 neutrons and 2 electrons. The symbol for helium is He and the atomic number is 2.
the number of helium in the periodic table is 2.
Helium is number two on the periodic table indicating that it has 2 protons.