Atomic weight = Weight of protons + Weight of neutrons

Atomic Number = 6. Atomic Weight = 12.011

zinatanium atomic weight 67, xethreneum atomic weight 35.8, isotope Triton atomic weight 54.721, venerutium atomic weight 43.6, cithaxuopium atomic weight 57, ullusium atomic weight 29, thorotuthium atomic weight 97, and finally the most complex and little known zithaxuthorioxium atomic weight about 45 but scientists are still testing

85.4678 is the atomic weight of Rb.

The atomic weight of platinum is: 195.084