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's atomic number is 2.
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 !
The atomic number of Helium is 2 because there are 2 protons and 2 electrons.
Helium has 2 protons and 2 electrons.
The atomic number of helium (He) is 2. This means that helium has 2 protons in its nucleus.
The symbol of Helium is He. Helium's atomic number is 2.
the number of helium in the periodic table is 2.
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.