None, the hydrogen nucleus is just one proton
http://wiki.answers.com/Q/How_many_neautrons_in_hydroge...
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Protons and Electrons The number of protons in an element is always the same as the atomic number, which is just 1 in this case. In a neutral atom (no charge), the number of electrons equals the number of protons, so it will be 1 electron a...
http://wiki.answers.com/Q/How_many_protons_neutrons_and...
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All hydrogen isotopes have one proton per atom. They differ in the number of neutrons. H-1 has no neutrons. H-2 has 1 neutrons (1 proton + 1 neutron = 2) H-3 has 2 neutrons. Also, hydrogen usually has 1 electron, but sometimes it is strippe...
http://answers.yahoo.com/question/index?qid=20081018070...
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For carbon it is 'carbon 12' meaning 6 protons plus 6 neutrons. Oxygen's most common isotope is 'oxygen 16', i.e. 8 protons and 8 neutrons. Since many isotopes are unstable (radioactive), some people think the word 'isotope' implies radioactivity, but really it doesn't.
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www.physlink.com/ae109.cfm
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If we only knew how many protons krypton has, we could figure out how many neutrons it has. Wait a minute... We do know how many protons krypton has! We did that back in Step 2! The atomic number (36) is the number of protons in krypton.
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education.jlab.org/qa/pen_number.html
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As you can see, helium is larger than hydrogen. As you add electrons, protons and neutrons, the size of the atom increases. We can measure an atom's size in two ways: using the atomic number (Z) or using the atomic mass (A, also known as the mass number).
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web.jjay.cuny.edu/~acarpi/NSC/3-atoms.htm
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However, from a nuclear perspective, they behave differently since they have different numbers of neutrons. Hydrogen is not in the noble gas family because its s orbital in its outermost shell (The first shell) is not filled.
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www.newton.dep.anl.gov/askasci/chem99/chem99057.htm
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Note: Many facts have been simplified to make them easier to understand.; Our new free weekly podcast Time Crystal tells this story as sci-fi fantasy ... Hydrogen is a type of atom which was created shortly after the big bang. Hydrogen atoms can join with other atoms using covalent bonds to create hydrogen molecules,
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www.historyoftheuniverse.com/hydrogen.html
www.historyoftheuniverse.com/hydrogen.html
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Now, what about the neutrons? We look at the periodic table and see that Hydrogen has an atomic weight, or mass, of 1. Hydrogen has one proton and an weight of one. Hummmm. So how many neutrons does hydrogen have?
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homepage.smc.edu/wissmann_paul/humanbiology/bio25bookch...
homepage.smc.edu/wissmann_paul/humanbiology/bio25bookch1a.html
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