How many neutrons are in the nucleus of an atom of 118^50Sn?

Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon, rather than 1 mol of 12C. What would the atomic mass of oxygen be? (The atomic masses of carbon and oxygen, based on the assignment of 12.000 g to 1 mol of 12C, are 12.011 amu and 15.9994 amu, respectively.)

A Se ion has a mass number of 75 and a charge of -2. Determine the number of neutrons, protons, and electrons in this ion.

Which of the following statements correctly describes a proton?

Which of the following statements about the nucleus of a carbon-12 atom is true?

If the charge (q) of an electron is -1, what is the charge (q) of a proton?

Specify the number of protons, neutrons, and electrons in the neutral atom of chromium-52.