abiellaisett
contestada

Which statement best describes why an element's atomic number is different from its atomic mass?

A. The atomic number represents the number of electrons, while the atomic mass represents the total mass of the protons and neutrons.

B. The atomic number represents the number of protons, neutrons, and electrons, while the atomic mass represents the total mass of the protons, neutrons, and electrons.

C. The atomic number represents the number of protons, while the atomic mass represents the total mass of the protons, neutrons, and electrons.

D. The atomic number represents the number of protons, while the atomic mass represents the total mass of the protons and electrons.

Respuesta :

rspill6

Answer: C

Explanation: The atomic number is fixed by the number of protons. An element will have an exact number of protons. The neutrons can vary, and they are the reason elements have isotopes (all the same number of protons, but some have differing numbers of neutrons). Electrons are too small to be counted in the atomic weight figures.

Otras preguntas