Protons & Neutrons. They are found in the nucleus of the atom and weigh roughly 1800 times what electrons weigh - with the electrons 'orbiting' like a microscopic 'solar system'.
Physics has not managed to discover a particle that accounts for mass
Protons and neutrons are the particles that account for most of an atom's mass. Electrons, which have much less mass, play a negligible role in the overall mass of an atom.
Protons and neutrons account for almost all the mass of an atom. Electrons have much less mass compared to protons and neutrons.
Negatively charged particles with almost no mass are called electrons. These subatomic particles orbit around the nucleus of an atom and are responsible for carrying electrical current and facilitating chemical reactions.
By particles, I assume you mean atoms. Firstly, you divide mass by molecular mass to get moles. Then multiply moles by avagadros number to get amount of atoms
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.
These particles are the protons and neutrons.
Almost all of an atom's mass is in the nucleus.
Two particles are considered. they are protons and nrutrons
Of the particles you mentioned, the electron has the smallest mass.
Protons and neutrons have almost the same mass.
The mass of unstable atoms can vary widely depending on the specific isotope and the decay process involved. Unstable atoms typically have a higher mass compared to stable atoms due to the presence of excess energy or additional subatomic particles. When unstable atoms undergo radioactive decay, they can transform into more stable elements by emitting particles and energy.