Answer:
Atomic mass is the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
Atomic number is the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.
Their relationship
Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element’s nucleus.
How are mass number and atomic mass related?
Together, the number of protons and the number of neutrons determine an element’s mass number. Since an element’s isotopes have slightly different mass numbers, the atomic mass is calculated by obtaining the mean of the mass numbers for its isotopes.
Difference
1. Atomic mass is proportional to the number of neutrons and protons contained in an element’s nucleus. The number of protons in an element’s nucleus is generally represented by its atomic number.
2. It is an element’s average weight. It is the total number of protons in the nucleus of an atom.
3. Atomic mass is denoted by A The letter Z is used to represent an atomic number.
3. Atomic mass cannot be used to determine the element’s kind. The atomic number is primarily used in the categorization and identification of elements.
4. Atomic mass is also used to differentiate between various isotopes of the same element. Isotopes only have one atomic number in common.
5. The atomic mass unit is commonly used to measure atomic mass (amu). An atomic number is just a digit used to arrange elements in a periodic chart.