[DOC] [TLE] How much heavier is a proton than an electron? | Reference.com [PAR] A proton is approximately 2,000 times heavier than an electron.
Protons and electrons, along with neutrons, are the principal sub-atomic particles that make up an atom.
 ... However, because protons are so much heavier than electrons, the electrons do not make a significant contribution ... [DOC] [TLE] Why are neutrons a little heavier than protons? - Quora [PAR] A majority of the mass difference of ~1.3 MeV is due to the quark interactions. 
Another effect is .... This means that the electromagnetic self energy of the proton 
is bigger than that for the neutrons -- i.e. the ... The proton has two +2/3 quarks 
and one -1/3 quark, while the neutron has two -1/3 quarks and one +2/3 quark. [DOC] [TLE] standard model - Why is Neutron Heavier than Proton? - Physics ... [PAR] Aug 15, 2012 ... One is that the up and down quark themselves have different masses. ... the fact 
that the down quark is heavier than the up quark that makes the neutron heavier 
than the proton. ... The positron is the electron's antiparticle. [DOC] [TLE] The mass of the proton and neutron are fine tuned for life [PAR] Nuclear scientists measure the mass of protons and electrons in units of millions 
... Basic textbooks sometimes say that protons and neutrons have the same mass
. ... So the difference between them is small: a neutron is about 1.29 MeV heavier 
than a proton. ... One of the protons changes into a neutron, forming a deuteron. [DOC] [TLE] Is the whole the sum of its parts?  Einstein Online [PAR] Why Einstein's famous formula tells us that the whole, as far as mass is ... a 
helium atom does not spontaneously split into the two protons and two neutrons 
that are its ... One MeV is defined as the energy gained by an electron 
accelerated by an ... fusing lighter atomic nuclei to give heavier nuclei is a 
process that sets free... [DOC] [TLE] Atom - Atomic Structure, Electron, Proton, Neutron [PAR] An atom is the smallest particle of an element that retains the characteristics of 
that ... heavier than electron.both the proton and neutron make the atomic mass 
of... [DOC] [TLE] A proton is 1000 times heavier than an electron, while a neutron is ... [PAR] a proton. If neutrons were another .1% heavier, all protons would convert to 
neutrons, ... If the force of gravity were changed by just one part in 10. 40 ... 
accurately must the charge of the electron be matched with that of the proton 
before such. [DOC] [TLE] What is an Atom? | Parts of an Atom - Live Science [PAR] Jun 5, 2013 ... Definition of an atom, nucleus, proton, neutron, electron and isotope. ... However, 
one proton weighs more than 1,800 electrons. ... a new element, while adding a 
neutron makes an isotope, or heavier version, of that atom. [DOC] [TLE] Questions and Answers - If different types of quarks have different ... [PAR] What are the relative masses of<br>protons, neutrons and electrons? ... For that 
to happen the neutron must be heavier than the proton. ... is made from three 
quarks - one of which is Strange, and the Sigma, which also has one Strange 
quark. [DOC] [TLE] Atoms, Elements and the Periodic Table [PAR] Protons have a positive electrical charge, neutrons are neutral, and electrons 
have ... to describe is the hydrogen atom, which has one proton and one neutron 
that ... measurable masses and their addition to the nucleus makes heavier 
atoms. [DOC] [TLE] Isotopes of hydrogen - Wikipedia [PAR] Hydrogen (H) (relative atomic mass: 1.00794) has three naturally occurring 
isotopes, sometimes denoted 1H, 2H, and 3H. The first two of these are stable 
while 3H has a half-life of 12.32 years. All heavier isotopes are synthetic and 
have a half-life less than one .... 4H contains one proton and three neutrons in its 
nucleus. [DOC] [TLE] Atom - Wikipedia [PAR] An atom is the smallest constituent unit of ordinary matter that has the properties 
of a chemical

Question: Of a proton, neutron or electron, the one that's heaviest
Answer: Neutron