Neutrons = 207 - 82 = 125
The total amount of protons and neutrons in an atom is its mass number.
The total number of protons and neutrons in an atom is given by the atomic mass number, which is the sum of the number of protons (atomic number) and the number of neutrons in the nucleus of the atom.
Add the Neutrons and Protons. The electrons are irrelevant in the mass number.
atomic mass number - protons = number or neutrons
There are two types of particles in the nucleus of an atom, which are the Protons and the Neutrons. The number of particles in the nucleus depends what is the element. For example, Oxygen has 8 protons and 8 neutrons in the nucleus and Phosphorus has 15 protons and 16 neutrons in the nucleus.
The total amount of protons and neutrons in an atom is its mass number.
If you add the number of protons to the number of neutrons in an atom, you have calculated that atom's atomic mass.
The total number of protons and neutrons in an atom is given by the atomic mass number, which is the sum of the number of protons (atomic number) and the number of neutrons in the nucleus of the atom.
Mass number!:)
The mass number is the sum of protons + neutrons.
mass number = protons + nuetrons
20. the mass of an atom is determined by the sum of the number of neutrons and protons the atom has.
Add the Neutrons and Protons. The electrons are irrelevant in the mass number.
atomic mass number - protons = number or neutrons
The atomic number of lead (Pb) is 82, which represents the number of protons. To find the total number of neutrons, subtract the atomic number from the mass number. For lead-207 (207Pb), the mass number is 207. Therefore, the total number of neutrons in an atom of 207 82 Pb is 207 - 82 = 125 neutrons.
Mass Number
There are two types of particles in the nucleus of an atom, which are the Protons and the Neutrons. The number of particles in the nucleus depends what is the element. For example, Oxygen has 8 protons and 8 neutrons in the nucleus and Phosphorus has 15 protons and 16 neutrons in the nucleus.