H2O has 10 protons.
Hydrogen has 1 proton, so 2 hydrogen have 2 protons.
Oxygen has 8 protons.
beryllium has 4 protons. helium has 2 protons
beryllium has 4 protons and helium has 2 protons
Number protons equal to atomic number. So the element is Helium
An element's atomic number gives its number of protons. Lutetium's atomic number is 71. Thus, it has 71 protons.
A Helium Nucleus so 2 protons and 2 neutrons Quarks are contained within the neutrons & protons and there are many types
There are 2 protons in a helium atom. Helium is the second lightest element on the periodic table, with an atomic number of 2, indicating the number of protons in its nucleus.
2 protons as its atomic number is 2
2 is the atomic number (or the number of protons) of helium.
Helium has 2 protons.
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 !
2 electrons. The atomic number is the number of protons and however many protons there are, that is also the number of electrons.
There are two protons in 3He. All isotopes and ions of the same elements will have the same number of protons regardless of the difference in the number of neutrons or electrons. So the information about which isotope is (by saying helium-3) is unneeded.
There are two protons present in helium-4 (4He2). The number "2" in the chemical symbol indicates the atomic number, which represents the number of protons in the nucleus of the atom. Helium has an atomic number of 2, hence 2 protons.
Radon (as down a group, the atomic size increases and the ionization energy decreases)
beryllium has 4 protons. helium has 2 protons
2
Helium with two protons and two neutrons has an atomic number of 2, as the atomic number corresponds to the number of protons in an atom.