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.
The rule for an ion with a charge of +2 or -2 -- a divalent ion -- is: 1 milliequivalent of a divalent ion is equal to 0.5 millimole of that ion. A sulfate ion has a charge of -2. If you have 20 mmol of sulfate ion, use the conversion factor divalent ion to set up the following calculation:onovalent Ion Example. The rule for an ion with a charge of +1 or -1 -- a monovalent ion -- is: 1 milliequivalent of a monovalent ion is equal to 1 millimole of that ion. A chlorine ion has a charge of -1.