Barium has an atomic number of 56 and a mass number of 137 amu
barium
Barium (Ba)
its atomic number is 56 its atomic weight is 137 hope that helps
The standard atomic weight for cesium is 133. There are 3 other radioactive cesium isotopes that have atomic weights of 134, 135, and 137. Cesium 133 is the only one that is found in nature. The other isotopes are synthetic.
Sn (tin) has an atomic number of 50, which indicates there are 50 protons in its nucleus. If the atomic mass is 118, then the number of neutrons is the difference between the two numbers, or 68 neutrons.
Beta Emission as there is no change in the atomic mass of the atom but there is an increase in the atomic no. of the atom.
The mass of a barium atom is approximately 137 atomic mass units (u).
barium
In atomic form (as opposed to being an ion), cesium-137 has 55 electrons, just as all cesium atoms have.
Barium (Ba)
The mass number is the sum of protons and electrons in the atomic nucleus of an isotope. Barium has many isotopes and each has another mass number.
The atomic number of barium is 56. So there are 56 protons and 56 electrons.
Barium is a non metal element. Atomic mass of it is 137.
Proton = 1 Neutron = 1 Electron = 0.00054
The atomic number of barium is 56. It has naturally occurring isotopes with mass numbers of 130, 132, 134, 135, 136, 137, and 138.
Ceasium is a metal element. Atomic mass of it is 133.
Same mass, atomic number one lower - Cs - caesium