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99.9% of an atom's mass is concentrated in the nucleus, with protons and neutrons having almost the same mass, with neutrons being slightly higher. So your question would be, 'What atom has the most protons and neutrons combined?' And that answer is Nobelium. Nobelium has 102 protons and 160 neutrons which makes it the most 'massive' atomic particle, even more so then Lawrencium which has 103 protons but only 159 neutrons.
Of course, in a few months, we could have a new, more massive element.
Wiki User
∙ 8y ago
Wiki User
∙ 11y agoSome atoms have Neutrons in their nucleus. if this true, then the Neutrons are the most massive.
If there are no Neutrons present, then the Protons are the most massive.
Wiki User
∙ 14y agoIf the atom contains a neutron then that is the most massive single particle. If no neutron is present then the proton is the most massive
Wiki User
∙ 11y agoYou think probable to alpha particles.
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What particle in the atom is the least massive?
least - electron most - the top quark
What conclusion about the atom came from Ernest Rutherfords famous gold foil experiment?
The conclusions were that the nucleus in an atom must:- (1) Be positive as it repelled the positive alpha-particles (2) Have a high mass, as the deflections were massive (3) Be very small as only a few of the particles were deflected
Which particles in an atom contribute most to mass of the atom?
The particles are protons, neutrons, and the nucleus inside of the atom Nice helping u >_<
Which is more massive a chlorine atom or a carbon atom?
a chlorine atom.
In Bohr's model which particles make up the most mass of the atom?
the electron particles make up the mostr mass
What particle in the atom is the least massive?
least - electron most - the top quark
What are the parts of an atom from largest to smallest?
An atom consists of three basic components: electrons, protons and neutrons. The three particles are listed in order of least massive to most massive. A neutron is slightly more massive than a proton, and these two particles make up the nucleus of an atom. Electrons are the smallest particles found in an atom, and an electron is less than 1/1800th the mass of a proton. They are so small that their mass is not even taken into consideration when calculating the mass number (protons plus neutrons) of an atom, even in larger atoms with large numbers of electrons.
What is the second most massive part of the atom?
oxygen
What is the list of particles in order from least massive to most massive?
Your brain -------->everything else that exists------------> my wang
Who said most of an atoms mass is in the nucleus in an atom?
Ernest Futher Ford
What subatomic particle or particles contributes the most to the mass of the atom?
These particles are protons and neutrons.
Is a atom bigger than a electron?
Quite a bit larger! Electrons are of very small mass and protons, even if just one, plus neutrons are about are 8000 to 10,000 times as large/massive as an electron. These particles make up most of the atom.
Which particle is most massive in radioactivity?
You think probable to alpha particles.
What are mass particles?
Particles that are heavy. Mass is like MASSive (massive) and massive objects could be heavy.
If there is no neutron or proton what is the most massive part of an atom?
the anti-proton
What particles account for most of the space of the atom?
Protons and neutrons
What particles make up most of the mass atom?
air,mater
