Question

what is meant by atomic mass number? explain how the atomic number and mass number of carbon are 6 and 12 respectively

Answer 1

hey mate here is your answer.....


''The mass number (symbol A, from the German word Atomgewichte (atomic weight), also called atomic mass number or nucleon number, is the totalnumber of protons and neutrons (together known as nucleons) in anatomic nucleus. ... The mass numberis different for each different isotope of a chemical element.''

&



''Carbon-12 is one of the most abundant isotopes with 6 protons and 6 neutrons therefore mass number would be 12. C-13 is another isotope of carbon which contains 6 protons and 7neutrons therefore the mass number would be 13.''


hope it helps you....


:-)

Answer 2

Atomic number: The number of protons in an atom.

Mass number: The number of protons and neutrons in an atom.

Isotopes: Atoms of the same element (same number of protons) but with a different number of neutrons.

Relative atomic mass (Ar): The average mass of an atom compared to 1/12th the mass of carbon-12.

The atomic number of carbon is 6, right off of the periodic table, and the mass number is 12, right out of your question.