The mass number indicates the sum of the number of protons and neutrons of the isotope. The mass number, nucleon number or atomic mass indicated about the respective chemical symbols in the Periodic Table are average figures based on the different isotopes and their relative abundance. That is why there are decimals in mass numbers in the periodic table. It can be used to compare the relative atomic masses of different atoms.
It represents the mass number.
Mass number
This the mass number of the isotope As-76.
The symbol Po-210 represents the isotope of Polonium with a mass number of 210.
Ca represents calcium. Calcium-40 represents the isotope of calcium that has a mass number of 40.
The mass number
The element symbol represents one mole of element , atomic number represents number of protons, atomic mass represents sum of protons and neutrons.
The mass number is the sum of the neutrons and protons which exist in the atomic nucleus of an isotope.
The mass number is sum of neutrons and protons in the atomic nucleus.
This is the mass number.
The atomic number represents the number of protons. The atomic mass represents the number of protons + neutrons.
It represents the atomic number and atomic mass. Mass number is the superscript Atomic number is the subscript
mass number
It represents the mass number.
mass number
Atoms atomic number represents their number of protons.
The mass number represents the total number of protons plus neutrons.