Which of the following is defined as the mass of an atom based on the mass of an atom of carbon-12? ? a. isotope b. atomic mass c. atomic charge d. atomic number

The B. atomic mass of an atom is based on the mass of an atom of carbon-12.

The ionic charge depends on the number of electrons.

The atomic number depends on the number of protons.

Isotopes depend on the number of neutrons.

h let me think

there is none because earth is stationary and flat.