Neutrons = 207 - 82 = 125
The total amount of protons and neutrons in an atom is its mass number.
atomic number is the total number of protons OR electrons in an atom. mass number is the total sum of number of protons and neutrons. atomic number subtracted from mass number gives the number of neutrons in an atom. Mass number - atomic number = number of neutrons.
The total number of protons plus the total number of 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.
It all depends on the atom. Carbon atoms often have 6 protons and 6 neutrons for example.
The total amount of protons and neutrons in an atom is its mass number.
18 neutrons
125 neutrons :)
If you add the number of protons to the number of neutrons in an atom, you have calculated that atom's atomic mass.
10
atomic number is the total number of protons OR electrons in an atom. mass number is the total sum of number of protons and neutrons. atomic number subtracted from mass number gives the number of neutrons in an atom. Mass number - atomic number = number of neutrons.
The total number of protons plus the total number of 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.
Mass Number
It all depends on the atom. Carbon atoms often have 6 protons and 6 neutrons for example.
Atomic mass is the number of protons and neutrons in an atom.
mass number = protons + nuetrons