how do you find the protons electorns atomic number and mass number when you know their are 16 electrons?

Question

i mean when the neutron number is 16 sorry!

Answer 1

You can't. An element's identity is give by the atomic number which has absolutely nothing to do with number of electrons.

Answer 2

If it is an element and not an ion, it will be element 16 on the periodic table (sulphur). It will therefore have 16 protons, as well. The number of neutrons present will depend on whether it is an isotope or not. Sulohur has an atomic mass of 32.07, which means that it is mostly present in the stable form containing 16 neutrons; but there will be present a very small proportion on unstable isotope. Sulphur has 4 stable isotopes with16, 17, 18 and 20 neutrons, and 5 unstable isotopes. S32 (16 neutrons) is by far the most common.

Edit: As with the answer above; you cannot tell which element it would be if you only know that it has 16 neutrons. It is MOST LIKELY to be the most stable form of sulfur, but it could also be phosphorus (element 15), which has a stable isotope containing 16 neutrons.
If you meant the number of protons; then the answer would certainly be sulfur, even if it was an ion of sulphur (ie containing more or less electrons than 16). It is the number of protons in the nucleus that identifies each element.

Answer 3

no. electrons = no. protons = atomic number
you cannot know the mass number from this only, unless given the number of neutrons, because:
mass number = protons + neutrons

the answer above me is wrong, because the atomic mass in the periodic table gives you an average of all the element's isotopes which have different number of neutrons.

Now: that you have corrected your question.... we cannot do anything at all! because the number of neutrons only will not give you any info of which element ur talking about... many atoms of different elements may have the same number of neutrons

Answer 4

go here:
http://education.jlab.org/qa/pen_number.html

Hope this helps :)