The number of protons and neutrons in its' nucleus.
mass number= no. of protons + no. of neutron
SHow your work
Mass of an atom is determined by the no. of protons+ no. of neutrons in the atom.
The Number Of Protons & Neutrons In An Atom.
The mass number of an atom is determined by counting the total number of protons and neutrons in its nucleus. Electrons, which are much lighter than protons and neutrons, are not included in the mass number calculation.
The mass number is used to calculate the number of nucleons in an atom. It represents the sum of protons and neutrons in the nucleus of an atom. By knowing the mass number, one can determine the approximate atomic mass of the atom.
No, the mass number of an element is the sum of protons and neutrons in the nucleus. To determine the number of electrons, you would need to know the atomic number of the element, which is equal to the number of protons. Electrons in a neutral atom equal the number of protons.
Number of Neutrons = Mass number - Atomic Number
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.
To determine the number of protons, neutrons, and electrons in an atom, you first need to know the atomic number, which represents the number of protons and, in a neutral atom, also the number of electrons. The mass number, which is the sum of protons and neutrons, can be used to calculate the number of neutrons by subtracting the atomic number from the mass number. For example, if an atom has an atomic number of 6 (carbon) and a mass number of 12, it has 6 protons, 6 electrons, and 6 neutrons (12 - 6 = 6).
no --- atomic number
Essentially an atom's mass is determined by its number of protons and neutrons, as mass of electrons is so minuscule relative the nucleus.