This would be the NUCLEUS.
The nucleus is the part of the atom made up of protons and neutrons, and it contains nearly all of the atom's mass. Electrons, which have much lesser mass, orbit around the nucleus.
Most of an atom's mass is concentrated in the nucleus, which is made up of protons and neutrons. While electrons contribute to the atom's overall structure, their mass is negligible compared to that of the nucleus. Thus, the nucleus is responsible for nearly all of the atom's mass.
The nucleus contains the mass.
The proton.The proton is a particle of the nucleus (a nucleon) of charge +1. Neutrons are nucleons with no charge, are slightly more massive than a proton, and are part of every atomic nucleus except for the simplest, Hydrogen (there are exceptions, of course, in deuterium and tritium, but here we will keep to simple Hydrogen.)Electrons are tiny by comparison, and are not a part of the nucleus. They "orbit" at some distance. They provide the -1 charge to balance the charge of a proton, but they have a very low mass, 1/1836 that of a proton.Except for the atom Hydrogen, where the proton is practically all the mass of the atom, the proton is the charged particle which accounts for nearly half of the mass of any atom.
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 nucleus is the part of the atom made up of protons and neutrons, and it contains nearly all of the atom's mass. Electrons, which have much lesser mass, orbit around the nucleus.
Most of an atom's mass is concentrated in the nucleus, which is made up of protons and neutrons. While electrons contribute to the atom's overall structure, their mass is negligible compared to that of the nucleus. Thus, the nucleus is responsible for nearly all of the atom's mass.
The mass of an atom is concentrated in the nucleus. Protons are a part of the nucleus, but not the entire thing. Neutrons are also in the nucleus and have nearly the same mass as protons.
The nucleus contains the mass.
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 nucleus of the atom
This is made up of protons and neutrons, this part of the atom contains nearly all the mass. This small particle of an atom that carries a negative charge.
The proton.The proton is a particle of the nucleus (a nucleon) of charge +1. Neutrons are nucleons with no charge, are slightly more massive than a proton, and are part of every atomic nucleus except for the simplest, Hydrogen (there are exceptions, of course, in deuterium and tritium, but here we will keep to simple Hydrogen.)Electrons are tiny by comparison, and are not a part of the nucleus. They "orbit" at some distance. They provide the -1 charge to balance the charge of a proton, but they have a very low mass, 1/1836 that of a proton.Except for the atom Hydrogen, where the proton is practically all the mass of the atom, the proton is the charged particle which accounts for nearly half of the mass of any atom.
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 nucleus is the small and dense center of an atom. It contains protons and neutrons, which are the subatomic particles that make up the majority of the atom's mass.
The electron.