Not necessarily; the characteristic stated in the question is valid for atoms of equal atomic number, not atomic weight.
Osmium has 5 stable isotopes and many more unstable isotopes, all having different atomic masses. See the related link below for a full table. Generally, its atomic mass no is taken as 190.23
Atomic weight = Weight of protons + Weight of neutrons
Unified atomic mass unit
Atomic Number = 6. Atomic Weight = 12.011
your mom is the atomic weight of a carbonate
Germanium (Ge) has an atomic weight of 72.64 g/mol
Atomic weight 28.086
The atomic weight of zirconium is 91,224.
85.4678 is the atomic weight of Rb.
The atomic weight of zirconium is 91,224.
Selenium (Se) has an atomic weight of 79,04.
atomic weight goes up faster