An element is made up of three isotopes, one of which (Bºx has a % abundance of 3.09%, while the other two are unknown. If the mass of the three isotopes are 28X(mass = 27.9769), X(mass = 28.9765) and
30x(mass = 29.9738), and the atomic weight of the element is 28.0855 amu, what are the % abundances of
the other two isotopes?

https://www.peoriapublicschools.org/cms/lib2/IL01001530/Centricity/Domain/2996/ChemE%20-%20Isotope%20worksheet%20answers.pdf

Explanation:

chemists can use the electron cloud model to assign electrons to different atomic orbitals. atomic orbitals also explain the patterns in the periodic table

explanation:

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.