an atom containing 13 protons,22 nuetrns and 13 nuetrons has a atomic number of?
106971
13. And I believe you mean 13 electrons. 13 protons, 22 neutrons, and 13 electrons. The atomic number is the number of protons in the nucleus.
763467
Lithium has four neutrons and three protons. The number of protons is determined by the Atomic Number, which is the number at the upper left of the periodic table. Using the nearest whole number of the atomic weight, which is the numerical average of the relative proportions of the isotopes, and subtracting the atomic number, the number of neutrons is determined. For lithium with an atomic weight of 6.941, or about 7, the number of neutrons is 7 - 3 = 4. P. S. I referred to my Periodic Table of the Elements, not the web for my answer. I do not normally search the web for my answers.
714831
the atomic number is 5 b/c atomic number equals the number of elctrons and protons. You have 5 electrons so it should be 5.
421869
Protons, Neutrons, and electrons
309925
Aluminum is element number 13, which means it has 13 protons.  the number of neutrons varies from isotope to isotope, but the most commonly occuring is also 13.  Aluminum in its ground state had 13 electrons.
880214
53 protons, 53 electrons, and 72 neutrons.  53 protons are the defining characterstic of an iodine atom and it is the atomic number of iodine.  There are 53 electrons as this iodine is electrically neutral so the number of protons equals the number of electrons.  A neutron and proton both weigh one atomic mass unit.  So since the mass here is 125 subtract the number of protons from 125 to get the number of neutrons.
288114
The atomic number tells you how many protons there are in the nucleus, and that's what identifies the element.  Subtract that number from the atomic weight and you get the number of neutrons.  Uranium has 92 protons and 143 neutrons (U235) or 146 neutrons (U238).  The different weights are called isotopes.  In an electrically neutral atom the number of electrons is the same as the number of protons.  Strip a few electrons away you get an ion (an ionized atom).  It's the structure of the electrons that strongly influences the chemical properties of the element.
172336
I believe the answer is Osmium. He is asking for number of neutrons, not number of protons. Take the atomic mass, (Os = 190.23) And subtract the number of protons it has (Os = 76), giving you an answer of 114.
820564
Sodium has an Atomic Number of 11 and an Mass Number of 23 \n\nThis means an atom of Sodium has 11 Protons and therefore 11 electrons. \n\nSince the number of Protons + Neutrons is 23 and there are 11 Protons there must be 12 Neutrons
974033
Atomic number always says how many protons.  Every element will always be defined by its unique number of protons.  Atomic number 5 will have 5 protons.  Electrons don't really weigh anything, so they don't count towards mass number.  So what's left? Neutrons.  So 10mass units-5for protons=5 neutrons (A)\n\nThe number of electrons in a neutral atom must cancel the charge of the protons.  Each proton is +1  and each electron is -1.  If I have 5 protons in the nucleus, I have +5.  A neutral atom should have 0 charge.  So 0=+5-(# of electrons) and you get 5 electrons (A)
853125
The atomic number of Aluminum is 13 (look at a periodic table). This means 13 protons and 13 electrons (since these are oppositely charged they have to balance each other.) To find the number of neutrons you subtract the number of protons from the atomic mass (the atomic mass is 27). So 27-13= 14 neutrons
798055
First the answer 129p and 130n is incorrect.  There is no element 129 and if there were it would certainly have more than 130 neutrons.  I think you are missing a piece of information, that being the atomic number or identity of the element. There are a number of elements that have an isotope that has a mass number of 259.  The 259 is the number of neutrons plus protons.  If you know the identity of the element, then you know number of protons (atomic number) and you can calculate the number of neutrons.  For example, if the isotope is No-259 then Nobelium has 102 protons and isotope would have 259-102 = 157 neutrons.  The number of electrons in an atom is equal to the number of protons.
424202
Carbon always has 6 protons. The 13 refers to the atomic mass (total number of protons plus neutrons) of this particular isotope of carbon. So the number of neutrons = 13-6=7.
16762
The atomic number is the number of protons.
150149
Francium has 87 protons.  This information is available on the Periodic Table of Elements, the atomic number (Z) of an element is the number of protons.
832260
A 60 over 28 Ni\nB 222 over 86 Rn\nC 0 over -1 e\nD 4 over 2 He\n\nMake sure all the subatomic particles balanced. Total number of nucleons (proton + neutron) and protons should be the same on both side of the equation.
254116
"mathematician" is correct.\n\nAny atom of a given element will have the same number of protons in its nucleus.  If the atom is neutral (i.e. has no charge), then it will have the same number of electrons as protons.\nHowever, the number of neutrons in the nucleus can vary slightly from atom to atom for a given element.  Atoms of the same element but with different numbers of neutrons in their nucleus are called isotopes.  With a greater/less number of neutrons, the over all atomic weight of the atom will varry.  By taking into account the naturally occuring percentages of each of these isotopes of a given element, we can obtain the average atomic mass of all the atoms of that element.\n\nCommon isotopes you might hear would be, "Carbon-12" or "Carbon-14", these are two different isotopes of the element Carbon.  The -# after the element name indicates the total atomic mass of the atom.  Since we know that Carbon always has 6 protons, we can easily determine the number of neutrons if we know the atomic mass.