The mass of a proton is 1836 times greater than the mass of an electron.
The sum of masses of protons, neutrons and electrons.
In a normal atom, the number of protons is equal to the number of electrons. This balance is necessary for the atom to be electrically neutral.
15 electrons and 15 protons
Isotopes of an element have different masses but the same atomic number. Isotopes have the same number of protons and electrons but different numbers of neutrons in their nuclei.
The numbers of protons and of electrons in a neutral object are the same.
The numbers of protons and the numbers of electrons balance; they are equal.
They are equal
The answer depends on what you compare them with. Compared to protons, they do not.
mass of electron = 1/1836 mass of proton (or neutron)
The atomic mass of an atom is determined by the combined masses of its protons, neutrons, and electrons. While electrons contribute very little to the atomic mass, the protons and neutrons, found in the nucleus, account for the majority of an atom's mass.
The number of protons is usually the same as the number of electrons!:)
The mass of an atom is primarily determined by the combined masses of its protons, neutrons, and electrons. Protons and neutrons contribute most of the mass since electrons have negligible mass. The exact mass of an atom can be found by adding up the masses of its protons, neutrons, and electrons.
Because the masses of protons, neutrons and electrons are not whole numbers.
The sum of masses of protons, neutrons and electrons.
If you mean subatomic particle as in protons neutrons and electrons, electrons have the lowest mass. If you are talking even smaller, leptons have extremely tiny rest masses.
The mass of an atom is the sum of the masses of protons, neutrons and electrons.
In a normal atom, the number of protons is equal to the number of electrons. This balance is necessary for the atom to be electrically neutral.