Drawing the Lewis Structure for PH3Viewing Notes:
Transcript: Hi, this is Dr. B. Let's do the PH3 Lewis structure. On the periodic table: Phosphorus, group 5, 5 valence electrons; Hydrogen, group 1, but we have three of them for a total of 8 valence electrons. We'll take and put the Phosphorus in the center. Hydrogens always go on the outside. We have 3 of them. We'll put 2 electrons between each of the atoms to form chemical bonds. We've used 6 valence electrons. Put the last two in the center for a total of 8 valence electrons. So we've used all 8 valence electrons. Hydrogen has 2, this Hydrogen has 2, as does this, so all the Hydrogens are OK since they only need 2 valence electrons for a full outer shell. Then the Phosphorus in the center has 8, so it has a full shell. That's the Lewis structure for PH3. This is Dr. B., and thanks for watching. |
|