Almost all of the mass in an atom is made up from the protons and neutrons in the nucleus, with a very small contribution from the orbiting electrons
The Outermost Electrons are the reactive particles of the atoms.
The fact that most alpha particles passed directly through the gold atoms suggests that the majority of an atom's mass is concentrated in a small, dense nucleus. This implies that the rest of the atom consists of mostly empty space with electrons moving around the nucleus.
negatively charged and takes up most of the atoms space Takes up most of the atoms mass and is negatively charged
The central core of an atom is called the nucleus. It contains protons and neutrons, which account for most of the atom's mass. Electrons orbit around the nucleus in specific energy levels.
air,mater
These particles are the protons and neutrons.
Physics has not managed to discover a particle that accounts for mass
The up and down quark accounts for most of an atoms mass. Two up quarks and one down quark forms a proton, and one up quark and two down quarks forms a neutron. Protons and neutrons form the nuclei of atoms, and comprise most of their mass, along with the binding energy holding them all together.
Protons and neutrons, which are found in an atom's nucleus, account for most of an atom's mass. Electrons, which orbit the nucleus, have much less mass compared to protons and neutrons.
Protons and neutrons have near identical mass. One will not have to account for the difference in mass in most calculations.
The two particles that make up most of the mass of a hydrogen-2 atom are the proton and neutron. The proton has a positive charge and is responsible for defining the element, while the neutron has no charge and helps stabilize the nucleus.
These particle are neutrons and protons; they are located in the atomic nucleus.
Neutrons is the answer. Both protons and neutrons have almost equal mass and concentrated in nucleus. Electrons have negligible mass as compared to mass of protons and neutrons and such minor figures are discarded in physics as much as mass isconcerned. Mass of electron is 1/1836 as compared to proton. But electric charge wise 'both' are equal and apposite.
Protons and neutrons have near identical mass. One will not have to account for the difference in mass in most calculations.
The nucleus.
More then 99% of an atoms mass is in the nucleus.
the nucleus