If you think to the number of protons in an element atom this number is equal to atomic number of this element.
The calculation of the mass of the proton and other properties are another questions and problems.
The mass number is the total number of protons and neutrons in an atom's nucleus. To calculate the mass number, simply add the number of protons and neutrons together in the nucleus of an atom.
equal to number of protons
The combined number of protons and neutrons is known as the mass number of an atom. It can be used to calculate the atomic mass by adding the total number of protons and neutrons in the nucleus of an atom.
Beryllium
18 protons 18 electrons 22 neutrons
The number of protons and neutrons in the nucleus
protons and neutrons in an atom. It is the sum of protons and neutrons in the nucleus of an atom.
11 protons and 12 neutrons
Protons and neutrons= mass
Helium-6 has two protons and electrons and four neutrons.
To calculate the atomic mass of an atom, you would add the number of protons and neutrons together. Protons and neutrons each have a mass of approximately 1 atomic mass unit (amu). The sum of the protons and neutrons will give you the atomic mass of the atom in atomic mass units.
The atomic weight minus the number of protons = the atom's neutrons.
Add the number of protons plus the number of neutrons for an approximate answer. Compared to protons and neutrons, electrons have zero mass - it takes over 1800 electrons to equal the mass of a proton or neutron.
There is no way of calculating protons and neutrons from total mass because there is no correlation between the number of porton and neutron.
count the protons and neutrons
The mass number is the total number of protons and neutrons in an atom's nucleus. To calculate the mass number, simply add the number of protons and neutrons together in the nucleus of an atom.
To calculate the number of subatomic particles in isotopes, you need to know the atomic number (number of protons) and mass number (sum of protons and neutrons) of the isotope. Subtract the atomic number from the mass number to find the number of neutrons. The number of electrons will be equal to the number of protons if the atom is neutral.