Question

A new element has two isotopes, one with a
mass of 40.0 amu and the other with a mass of
42.0 amu. The atomic weight is 40.50 g/mol.
Pick the true statement
A. The isotope at 42.0 amu is less abundant

B. The element has 19 protons and 21 neutrons

C. The isotope at 40.0 amu is less abundant

D. Both isotopes are equally abundant

E. The element has 20 protons and 21 electrons

F. There is not enough information given

G. The element is calcium