Depends on the atom. The atomic number will give you the number of protons. The atomic weight will give you approximately the number of protons and neutrons combined.
The total amount of protons and neutrons in an atom is its mass number.
An atomic nucleus contain protons and neutrons; protons and neutrons contain quarks and gluons.
The number of protons
Atomic mass is simply the sum of the number of protons and the number of neutrons. If an atom has "A" protons and "B" neutrons, its atomic mass is A + B.
Atomic number = number of protons + number of neutrons Mass number = number of protons + number of neutrons
nass number is the number of neutrons plus protons in the nucleus of an atom
The total amount of protons and neutrons in an atom is its mass number.
Mass number = Protons+Neutrons
An atomic nucleus contain protons and neutrons; protons and neutrons contain quarks and gluons.
The mass number is the sum of protons + neutrons.
The number of protons
To the find the mass number of an atom you add the protons and neutrons. Meaning that the mass number of this atom is 12.
The sum of the number of protons and neutrons in an atom
Mass number!:)
20. the mass of an atom is determined by the sum of the number of neutrons and protons the atom has.
The number protons in an atom is called the atomic number (it is this number that tells us which element the atom is). The number of neutrons in an atom can change, but the term for the amount of neutrons is called an isotope. The number of protons and neutrons added together is called the atomic mass.
Neutrons = Mass number - Number of Protons