2 is the atomic number (or the number of protons) of helium.
The atomic number of Helium is 2.
4 is the mass number of helium (mass number = number of protons + number of neutrons)
Helium's atomic number is 2.
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
The atomic number of helium (He) is 2. This means that helium has 2 protons in its nucleus.
The atomic number of Helium is 2.
The atomic number of helium is 2. It has 2 protons in its nucleus, which defines its atomic number.
4 is the mass number of helium (mass number = number of protons + number of neutrons)
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's atomic number is 2.
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
The atomic number of helium (He) is 2. This means that helium has 2 protons in its nucleus.
Helium has 2 protons and 2 electrons.
4He or He4. 4 stands for the mass number of Helium Mass number = number of protons + number of neutrons Since the atomic number or number of protons in helium is 2, the number of neutrons in He-4 is also 2.
The noble gas with the smallest atomic number is helium, with an atomic number of 2.
the number of helium in the periodic table is 2.
The outer shell of helium does not have an atomic number, that number belongs to helium itself whose atomic number is 2.