Yes.
The atomic mass of francium is approximately 223. It is a highly radioactive element and the heaviest known alkali metal.
The atomic number of francium (Fr) is 87.The atomic weight of Fr is 223 grams per mole.See the Web Links to the left of this answer for a periodic table with more information about this element!
223
The atomic mass of the most stable and common isotope of francium, 223Fr, is 223,019 735 9(26).
Francium is a non metallic element. Mass number of it is 223.
The atomic number of francium is 87. This means that it has 87 each of protons and electrons. The number of neutrons depends on the isotope, but the most common one, Fr-223, has 223 - 87 = 136 neutrons. (The number of neutrons is always the isotope mass number minus the atomic number.)
The chemical symbol of francium is Fr correct !
Francium is a non metal element. Atomic mass of it is 223.
Francium has a greater atomic mass than potassium. Francium has an atomic mass of around 223 u while potassium has an atomic mass of around 39 u.
The estimated value of the density is 1,87 g/cm3. The atomic mass of the most stable isotope, 223Fr, is 223,019 735 9(26).
Examples: francium-223 or Fr-223.
Francium-223 decay to radium-223; each isotope have another type of decay.