Table of Contents
Atomic Number and Mass Number-:
The atomic number of an element is the number of protons in the nucleus of an atom of that element. The mass number of an element is the number of protons plus the number of neutrons in the nucleus of an atom of that element.
Atomic Number-:
The atomic number of an element is the number of protons in the nucleus of an atom of that element. The atomic mass of an element is the average mass of an atom of that element, measured in atomic mass units.
Atomic Mass Number-:
The atomic mass number (A) is the total number of protons and neutrons in an atom. It is also called the atomic weight.
Isotopes and Isobars-:
Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. For example, both carbon-12 and carbon-14 are atoms of the element carbon, but carbon-12 has six neutrons in its nucleus, while carbon-14 has eight neutrons. Isobars are atoms of different elements that have the same number of protons in their nuclei. For example, both oxygen-16 and sulfur-32 are atoms of different elements, but they both have 16 protons in their nuclei.
