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No partial or complete atom has anywhere near 12,000 times the mass of
a hydrogen atom.
The mass of the hydrogen atom is 1 Atomic Mass unit (AMU), corresponding to
the single proton in its nucleus.
The largest, most massive atom that presently occurs naturally on Earth is that
of Uranium. The heaviest form of Uranium has 238 protons and neutrons in its
nucleus, for an atomic mass of around 238.
All of these mass numbers correspond to the number of protons and neutrons
in the nucleus. The electrons surrounding the nucleus are largely ignored, for
a few reasons:
-- Electrons come and go, get added to and separated from atoms, rather easily.
-- 1 proton or 1 neutron have as much mass as about 1,840 electrons, so a few
electrons more or less doesn't make much difference in the mass of an atom.
-- The most complex atom ... Uranium again ... normally has only about 92
electrons, which amounts to only about 5 percent of one proton or neutron,
so they don't have much impact on an atomic mass of 238 .
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoIf this is coursework, I suspect that the answer that you are supposed to come up with is the neutron, but it's not correct - it's actually much more complicated than that.
The masses of a Proton is 938.272 MeV, and that of an electron is 0.511 Mev, the total being 938.783MeV. It's commonly taught that a neutron is a proton plus an electron, because that fits nicely with the fact that the combined pair would neutralise their charges. The problem is that the mass of a neutron is 939.566 MeV, which is 0.783MeV heavier than the hydrogen atom - a difference that is more than the mass of the electron, so a neutron weighs more than a proton plus two electrons.
In any case, it would be equally valid to say that a proton consists of a neutron plus a positron (an anti-electron, which has a positive charge).
SO - the conclusion?
The particle with the same mass as the hydrogen atom? there isn't one.
The particle with the closest mass to that of the hydrogen atom? The proton
The particle that your tutor probably expects? The neutron - but that answer is 100% wrong
Wiki User
∙ 10y agoApproximately, an electron. The mass of a hydrogen atom is 1.00794u. The electron weighs 0.00054858u.
Wiki User
∙ 7y agoThese particles are proton or neutron.
Wiki User
∙ 11y agoelectron
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When a beta particle is released from an atom does the atom gain or lose mass?
When a beta particle is released, the atom's mass remains approximately the same because it loses an electron, which has such a small mass in comparison to the whole atom that it is negligible.
The atomic number increases but the atomic mass stays the same?
The atomic number increases but the atomic mass stays the same after the emission of a beta particle by a radioactive atom.
What particle consists of two protons and two neutrons it is the same as a helium nucleus release of a what particle by an atom decreases the atomic number by 2 and the mass number by 4?
an alpha particle
An atom of helium has a mass about four times greater than that of an atom of hydrogen Which choice makes the correct comparison of the relative numbers of helium and hydrogen atoms in equal masses o?
the number of helium and hydrogen atoms is the same
Is a hydrogen atom bigger smaller or the same size as an oxygen atom?
Hydrogen atoms are the smallest known elements, and therefore smaller than oxygen atoms (according to atomic weight and atomic mass).
What can be considered to be the combination of a proton and an electron?
The pair form a hydrogen atom.There is a fallacy that's taught about this pairing, which is that the electron-proton pair form a neutron. See my answer to the question "What particle has the same mass as a hydrogen atom?" for more details about this, and why it is wrong.
When a beta particle is released from an atom does the atom gain or lose mass?
When a beta particle is released, the atom's mass remains approximately the same because it loses an electron, which has such a small mass in comparison to the whole atom that it is negligible.
What is a neutral particle in the nucleus of atom with the same mass as a proton?
Neutron
What is the proton for xenon?
A proton is a subatomic particle which is the same in whichever element it is found. A proton from a Xenon atom is no different to that from a Hydrogen atom or a Uranium atom.
Does an oxygen atom weight the same as a hydrogen atom?
an oxygen and a hydrogen atom do not weight the same
The atomic number increases but the atomic mass stays the same?
The atomic number increases but the atomic mass stays the same after the emission of a beta particle by a radioactive atom.
Is the mass number of an atom equal to the atomic number?
Only if the atom is hydrogen-1! The mass number of the atom is equal to the sum of the numbers of protons, which is the same as the atomic number, plus the number of neutrons. The only non-radioactive atom without neutrons is hydrogen-1.
What particle consists of two protons and two neutrons it is the same as a helium nucleus release of a what particle by an atom decreases the atomic number by 2 and the mass number by 4?
an alpha particle
How many hydrogen atoms make up the same mass as one sodium atom?
22
Which element has the lowest mass on the periodic table?
The atom that has the lowest mass is hydrogen. So assuming the same numbers of atoms in each element, hydrogen would be the element with the lowest mass.
Who has greater kinetic energy a hydrogen atom or a carbon atom moving at the same speed?
carbon because it has a greater mass.
Is the Mass of hydrogen atom is about the same as a proton?
Yes, in general. All hydrogen atoms contain one proton, most with no neutrons and all neutral atoms with one electron - and the electron has a much smaller mass. Some hydrogen atoms contain one (or, rarely, two) neutrons and so are heavier. But on average the atom has a mass much the same as a proton.
