i need to know them for aluminum, but if you could just give me how to find them, that would be great
2006-10-14 07:09:17 · 7 answers · asked by um yea hi 4 in Science & Mathematics ➔ Chemistry
No of protons are given in the periodic table at the bottom of an element and no of protons equal no of electrons.
No of neutrons can be determined from the periodic table as well
Subtract no of protons from the average atomic mass of an atom, that is the no of neutrons
e.g. Na Atomic mass of 23 and proton no is 11 therfore, it has 11 protons, 11 electrons and 12 neutrons.
23 - 11 = 12
For Aluminum : It has mass of 27 and proton no is 13, therefore, it has 13 protons, 13 electrons and 14 neutrons
27 - 13 = 14
2006-10-14 07:14:13 · answer #1 · answered by Fatima A 3 · 0⤊ 0⤋
The number of protons equals the number of neutrons (except in isotopes) then the number of electrons is equal to that same number minus (or plus) a few. The difference is the charge of the molecules. i.e. +2 for water. Most molecules in biology want to get to the same state as the halogens, 8 electrons in their outer shell. With aluminum you need to know if it's in the +2 or +3 state (I think those are right) then count up 1s^2,....up to 1d# for where aluminum is. The first 2 columns on the periodic table are the s group the right 8 are something I can't remember right now, (I want to say p) and the d group is the 10 in the center. (I don't have the table in front of me right now).
2006-10-14 07:21:14 · answer #2 · answered by c_s_mark 2 · 0⤊ 0⤋
Atomic Number-- written in the lower-left hand of the latin symbol of the element-- tells you the number of protons, which is ecxactly the same as the number of the electrons for a neutral atom (i.e an atom that has no charge). And Mass Number, written in the upper-left hand of the symbol of the element, tells you "the number of protons+the number of neutrons". Hence, you obtain the number of neutrons by subtracting the Mass Number from the Atomic Number.
In the Periodic Chart of Elements, the elements are written in order of their atomic number, so you can find easily.
*Note: The number of neutrons is equal to OR greater than the number of protons. (it depends on the atom)
2006-10-14 07:42:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The atomic number is always the number of the protons, electrons don't have much weight, and if the element is not charged or part of a compound has the same number of electrons as protons. Neutrons = isotope # - protons
2006-10-14 07:13:03 · answer #4 · answered by Anonymous · 1⤊ 0⤋
You first could examine out the periodic table. each and each factor is listed in its very own individual sq. with the factor image (e.g. C for Carbon). The atomic selection is the selection on the proper of the sq. and represents the form of protons, it is comparable to the form of electrons. The atomic mass of the factor is the selection listed on the backside of the factor image. to be certain the form of neutrons, you may around the atmoic mass to the closest finished selection and subtract it from the atomic selection (i.e. form of protons or form of electrons). This distinction will supply the completed form of neutrons.
2016-12-26 19:10:03 · answer #5 · answered by schneir 3 · 0⤊ 0⤋
ooooorrrr. . . . You can use a strong microscope and try to count them real fast as they spin round. If the image is too blurry there are more than 5 electrons.
2006-10-14 07:17:53 · answer #6 · answered by Ronald K 2 · 0⤊ 0⤋
Chart of the elements-google it
2006-10-14 07:11:39 · answer #7 · answered by super stud 4 · 0⤊ 0⤋