how do u find the number of electrons in an element?
965248
The atomic number (the big number in the middle or on top of the square) represents the number of protons in the atom, but since an atom is by definition neutral, the number of electrons is the same.  For an ion, you would take the atomic number and subtract the charge, so for instance, carbon (atomic # 12) with a +1 charge would have 11 electrons.
138200
This is based on the electons in the outer shell of the atom you are drawing. From the periodic table you can see how many electrons are in the outer shell e.g. Na has 1, Cl has 7, to create a complete shell (8) they combine to form NaCl. \n\nIf you wanted to draw all of the electrons then you would draw the first shell with 2, which completes the first row of the periodic table, then the second with 8, then the third with 1 (for Na). For Cl you would draw the first shell with 2, which completes the first row of the periodic table, then the second with 8, then the third with 7. \n\nIf you wanted to show the bond between them then you would draw the shells with the final circles combining and two electrons touching the circles.\n\nI did a search and found the website below, there are probably better ones out there but this gives a pictorial representation of some of what I say
803831
14 of each\n\nhttp://www.webelements.com/webelements/elements/text/Ag/ionz.html
120648
determine how many valence electrons each atom has. locate the central atom and spread out its valence electrons(each electron is represented by a dot). then pair up one from the atoms attached to the central atom. finally put all the other electrons for each outer atom around it.\nyou should see all electrons paired up, many times each atom will end up with eight electrons around it but many times there will be more or less than eight.
972738
The number of protons is equal to the number of electrons (unless it is an ion), but in this case they are equal. The atomic number is equal to the number of protons, and the mass number is the number of protons plus the number of neutrons.
192170
The number of electrons in an energy level is given by the equation 2n^2, where n is the principal quantum number. So for the 5th energy level, it would be 2(5)^2, or 50, for the sixth it would be 2(6)^2, or 72 and so on.
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.
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)
446055
Electrons per shell 2, 8, 18, 3
365377
atomic number represents the number of protons or electrons in an atom
912160
[N=C=S]-  with 2 pair of electrons for each: N & S. Count the valence electrons for each atom (5 for N, 4 for C & 6 for C) plus an electron for the minus. You have a total of 16 electrons. Draw the structure. Every bond contains 2 electrons, so inicialy you'll see that you only have 4, put the other as pair of electrons around each atom (respecting the octect rule- 8 electrons for each atom-except for H that only can have 2- and families after period 2 don't necessarly respect it, but for now you can ignore this last fact). After you do this you'll see that you have more electrons than needed, this is where you have draw double or triple bonds. Count the bonds and pair of electrons (each have 2) until you are sure you have your 16. [ ] are to indicate charge.
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.
29071
Well, look in the periodic table of the elements and find the molecular weight. The molecular weight tells you how many grams are in one mole of that element. Once you know the amount of grams that correspond to 1 mole, you do the math.\nGood luck!
108641
if you want to know the number of electrons for a sample, you need to calculate the molarity of the substance and then multiply by the number of electrons that that element has. \n\nFor example:  you have 18 grams of water.  I picked that amount since the molecular weight of water is 18grams/mol.  (the mol weight of oxygen is 16 and 1 for hydrogen H2O =18grams of water is one mol of water)  A mol of sample is 6.02214199 × 10^23.  Yes thats a big number but its just like saying I have a dozen of something, a mol is a quantity of something.  I could have a mol of cars which would be 6.02x10^23 cars.  The reason we use such a big number is that there are so many atoms in even a tiny sample.  \n\nAnyways, 18 grams of water is one mol of water which is 6.02x10^23 molecules of water.  Now we need to figure out how many electrons are in one molecule of water and multiply it by the number of water molecules.  Oxygen has 8 protons and thus 8 electrons, hydrogen has 1 electron each, so a water molecule has 10 electrons.  So 6.02x10^23 times 10 more would equal 6.02x10^24 electrons in 18 grams of water.  (lots)
246055
51 electrons.\n\nbtw-the atomic number of an element (antimoney is 51) corresponds to the number of electrons in a neutral atom.\n\ni.e.=hydrogen is 1, and has 1 electron in a neutral state.
695264
Oxidation numbers: tell which atoms lose or gain electrons in chemical reactions, they can be determined by electronegativity\n\nThis web-site lays it out for you and gives examples.\n\nhttp://st19.startlogic.com/~honorsph/honorsphysicalscience/chemical%20formulas/writing_formulas.htm
924435
1 Find the current flowing in the lamp.   P  = VI\n2 Look up the charge on an electron.     q\n\nDivide 1  by 2  which will give you the number of electrons flowing per second.      n  =  I/q