The shortcuts for Windows 7. If you have not made the leap to Windows 8, this little cheat sheet will help you work more efficiently with Windows 7. Note: This list is part of Greg Shultz's comprehensive collection of Windows keyboard shortcuts, available as a PDF download. Also read: Free cheat sheet of 100 Windows 8 keyboard shortcuts.
i just ran across a problem asking me to identify the valence electrons on a sulfur atom in a sulfate ion. my understanding is that sulfate ion = 4 oxygen + 1 sulfur atom and has a 2- charge. now, in the answer to this question, it reads: sulfur in a sulfate ion has 12 valence electrons, its original six... *which i was able to find; 1s2,2s2,2p6,3s2,3p4 plus 6 more from the oxygens to which it is bonded.
This number also tell us the number of protons in that atom. So we know that a sulfur ATOM has 16 protons. Usuall y ATOMS are always electrical neutral. ........That means that the number of protons (+ charges) and the number of electrons (-negative charges) must be the same.In the case of sulfur, a sulfur atom has 16 protons and 16 electrons.hen that happens, sulfur calles itself sulf-IDE (sulfide), it now has 2 more electrons.... 2 + 16 = 18 electrons, the number of protons does not change it is still 16. let's add it up -18 +16 = -2 the sulfide has a -2 charge.