the electron is the least massive atomic particle
The nucleus, made up of protons and neutrons, contains most of an atom's mass.
Isotope.
Atomic mass is based on the proton and neutron. For the most part the mass of an electron is infinitesimally small.
Protons have a positive charge and weigh 1 AMU Neutrons have a neutral charge and weigh 1 AMU Electrons have a negative charge and 1184 electrons weigh 1AMU so they are thought to add nothing to the mass of an atom. You may want to check out Bohr's model or the duet/octet rule.
Most of the mass in an atom is in the nucleus. The protons and neutrons are about the same weight, 1 amu. The elecrtons are 1/1840 of the mass of an proton. Neutrons are 2000 times heavier than electrons and protons have an equal mass of neutrons
Electron. Contains basicaly no mass what so ever.
Which particle? The electron.
The nucleus contains the mass.
the nucleus of the atom
least - electron most - the top quark
the nucleus
Electrons have the least mass of the three main subatomic particles found in an atom (protons, neutrons, and electrons). They have a mass that is approximately 1/1836 times that of a proton or neutron.
The smallest part of an atom would be a quark. Quarks are either up or down quarks, and have virtually no mass. Neutrinos have even less mass, but are not part of an atom.
the electron
The election within an atom would have the least mass. Protons and neutrons have a mass roughly that of 1amu, while an electron's is 1/1840 of an amu.
The electron.
the electron