One more proton in La,
and one (or more) neutrons, depending on what isotopes are compared.
There is also 1 extra electron but that's not in nucleus.
Each barium atom has 56 protons in its nucleus.
Any neutral atom of barium contains 56 electrons, the counter charge for the 56 protons contained in the nucleus of a barium atom, as indicated by its atomic number, 56.
A barium atom has two valence electrons.
The barium atom (neutral) contain 56 electrons.
The empirical formula for barium sulfide (BaS) is one barium atom bonded to one sulfur atom.
Each barium atom has 56 protons in its nucleus.
The atomic number of barium is 56. This means that a barium atom has 56 protons in its nucleus.
Barium's atomic number is 56, so it has 56 protons.
Lanthanum's atomic number is 57 thus it has 57 protons, the number of protons an atom has is equal to the atomic weight, in this case 141 minus the number of protons or 57 so, 141-57=84 Lanthanum-141 has 84 neutrons.
Atomic Number is 47; Atomic Mass is 137.3; Element Name is Barium; Classified as the Alkaline Earth Metals.
Any neutral atom of barium contains 56 electrons, the counter charge for the 56 protons contained in the nucleus of a barium atom, as indicated by its atomic number, 56.
Protons and neutrons are contained within the nucleus of an atom. The nucleus is located at the center of the atom and it is where most of the atom's mass is concentrated. Electrons, which are negatively charged particles, orbit around the nucleus in electron shells.
The barium atom has a much bigger radius.
2 extra neutrons
A barium atom has two valence electrons.
The nucleus of hydrogen has 1 proton, whereas that of helium has 2 protons.
The nucleus of hydrogen has 1 proton, whereas that of helium has 2 protons.