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Hi everyone. This is the presentation of my reflex red dot I bought i one year ago on airsoftpark for $30 ( link in the description ) It comes in a black box like this one, but this one in particular...
PFEIFER: I'm Laura Pfeifer. I'm a PhD student over at Northeastern University in the College of Computer and Information Science. My research, what I'm studying, is I really am...
Hi, this is Dr. B. Let's do the SO2 Lewis structure. On the periodic table: Sulfur, 6 valence electrons. Oxygen has 6. We have two Oxygens, though, for a total of 18 valence electrons....
This is the NO3- Lewis structure: the nitrate ion. Nitrogen has 5 valence electrons. Oxygen has 6, we have 3 Oxygens, and we need to add 1 for this valence electron up here. That gives us a total of 5...
OK, this is Dr. B. We're going to do the Lewis structure for NH3: ammonia or Nitrogen trihydride. On the periodic table, Nitrogen is in group 5 or 15 so it has 5 valence electrons, and then...