Atomic mass is found by adding together the individual masses of the numbers of protons, neutrons, and electrons in the atom.--> Atomic Mass = protons + neutrons
In science the basic unit is the atom which is composed of neutrons, protons, and electrons. Electrons are generally considered to small to count as part of the mass. Atomic mass is the sum of neutrons and protons. For example: Oxygen has 6 protons and, in its natural state, 6 neutrons. This means that its atomic mass is 12.
It depends on what you mean by what parts are equal. Protons and electrons both have the same magnitude of charge with opposite signs and electrons are much less massive than protons. Protons and neutrons are approximately equal in mass but protons have a charge of +e Coulombs while neutrons have a charge of 0. Atoms can often exist with unequal numbers of protons and electrons. Such atoms are called ions and have a negative charge if they have more electrons than protons and positive charge if they have more protons than electrons.
The atomic mass NUMBER equals the number of protons and neutrons in an atom. DO NOT confuse this with the mass of an atom.
U 240 = 92 Protons + 92 Electrons + 148 Neutrons
4 protons, 4 electrons and 5 neutrons
4 protons, 4 electrons and 6 neutrons.
Lithium has 3 protons, 4 neutrons, and 3 electrons.
4 protons 4 electrons 5 neutrons
Beryllium has 4 protons, 5 neutrons and 4 electrons.
Beryllium has 4 protons, 4 electrons and 5 neutrons (in its most stable isotope)
All beryllium atoms have 4 protons and 4 electrons. The number of neutrons is characteristic of a particular isotope, not of beryllium as a whole, and may be determined by subtracting 4, the number of protons, from the mass number of the isotope.
Helium has 2 protons, 2 electrons, and 2 neutrons.
A lithium atom typically has 3 protons, 4 neutrons, and 3 electrons.
Protons: 2 neutrons: 2 electrons: 2 Helium-3: 2 protons, 1 neutron, 2 electrons Helium-4: 2 protons, 2 neutrons, 2 electrons
There are 5 neutrons in beryllium 4 electrons and 4 protons.
40Ar has 18 protons, 22 neutrons, and 18 electrons.