A high-school answer would probably be the electron. (Of course, maybe you go to an advanced high school?)
The nucleus of an atom is the heaviest part and contains most of the atom's mass. It is made up of protons and neutrons. Electrons, which orbit the nucleus, have much less mass compared to protons and neutrons.
The nucleus is a very small part of an atom, containing nearly all of its mass in a tiny volume. The mass of a nucleus depends on the number of protons and neutrons it contains, while its volume is estimated to be about 1 femtometer cubed, which is extremely small.
The three main subatomic particles are the proton, neutron, and electron. Of these three, the electron has the least amount of mass at about 0.0005 amu or atomic mass units.
No, many objects have no mass (at least no mass that is part of the body concerned) at their centre of mass. Not ,necessarily. Center of mass is an imaginary point.(at least no mass that is part of the body concerned)
The number of neutrons in an atom can affect the atomic mass of an atom.
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
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 is the least massive atomic particleelectron
The electron.
the electron