Francium is a non metal element. Atomic Mass of it is 223.
40.078
The atomic mass of the most stable and common isotope of francium, 223Fr, is 223,019 735 9(26).
The atomic mass of francium is approximately 223. It is a highly radioactive element and the heaviest known alkali metal.
87: Francium(Fr). It's atomic mass is 223.0
When Fr-223 undergoes alpha decay, it emits an alpha particle consisting of two protons and two neutrons. This transforms the nucleus into a different element with atomic number decreased by 2 and atomic mass number decreased by 4.
Atomic no.=no. of protons Atomic mass=no. of protons+no. of neutrons Hence, atomic mass is greater
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
Only isotopes Fr-221 and Fr-223 are natural.
Atomic mass
The atomic mass (or weight) of silver is 107.8682 amu (atomic mass units)
The atomic mass number of aluminum is 27. The atomic mass of aluminum is 26.98115386
Cobalt has an atomic mass of 58.933195(5) while nickel has an atomic mass of 58.6934(4). Nickel has the lower atomic mass.