Table of Contents
Definition of 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 and Mass Number Difference
Atomic Number, Atomic Mass, and Relative Atomic Mass
The atomic number is the number of protons in an atom. The atomic mass is the total mass of protons and neutrons in an atom. The relative atomic mass is the average mass of an atom compared to 1/12th the mass of a carbon-12 atom.
Atomic Number
The atomic number of an element is the number of protons in the nucleus of an atom of that element.
Importance of Atomic Numbers
The atomic number of an element is the number of protons in the nucleus of an atom of that element. It is also the number of electrons in the atom. The atomic number is unique to each element. It is used to identify elements in the periodic table.
Examples of Atomic Numbers
The atomic numbers for the first 20 elements are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.
Finding the Atomic Number
The atomic number of an element is the number of protons in the nucleus of an atom of that element.
Mass Number
The number of atoms in a mole of a substance.
Use of Mass Number
The mass number of an atom is the number of protons and neutrons in the nucleus. It is a measure of the size of an atom.
Properties of Mass Number
The mass number of an atom is the number of protons and neutrons in the nucleus.
The mass number is a positive integer.
The mass number is a measure of the atomic weight of an atom.
The mass number is a measure of the nuclear stability of an atom.
The mass number is a measure of the number of nuclear particles in an atom.
Difference Between Atomic Number and Mass Number
The atomic number is the number of protons in an atom, while the other is the total number of protons and neutrons in an atom.
