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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.
What else can I help you with?
What particle in the atom is the least massive?
least - electron most - the top quark
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 is more massive than a carbon atom. Chlorine has an atomic mass of 35.45 amu, while carbon has an atomic mass of 12.01 amu.
Fundamental particle of an atom?
Protons and neutrons are found in the nucleus. While these are theoretically composed of quarks (conversely even more massive particles), quarks do not exist in a free state so are not "fundamental particles" by definition.
What is a positively central part of an atom?
In the nucleus of an atom, the positively charged particles are called Protons.
What particle in the atom is the least massive?
least - electron most - the top quark
What is the most massive of all known elementary particles?
The most massive of all known elementary particles is the top quark.
What lists ranks nuclear radiation from most massive to least massive?
The ranks for nuclear radiation from most massive to least massive are: alpha particles, beta particles, gamma rays, and neutron radiation. Alpha particles are the most massive and have the least penetration power, while neutron radiation is the least massive and can penetrate deeply into materials.
What is the second most massive part of the atom?
oxygen
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 list of particles in order from least massive to most massive?
Your brain -------->everything else that exists------------> my wang
If there is no neutron or proton what is the most massive part of an atom?
the anti-proton
Which particle is most massive in radioactivity?
You think probable to alpha particles.
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.
What subatomic particle or particles contributes the most to the mass of the atom?
These particles are protons and neutrons.
What are mass particles?
Particles that are heavy. Mass is like MASSive (massive) and massive objects could be heavy.
What particles account for most of the space of the atom?
Protons and neutrons
