00:01
So when we want to draw the loo assemble of an atom with a charge, it's important to notice that for a minus charge, this will indicate an addition of one electron because electrons are negative.
00:12
And so if we have something with, say, a positive charge, this will indicate a loss of an electron and actually in addition of a proton because protons are positive.
00:23
And so here for our first one, we have h minus.
00:26
And the way i like to approach this is to draw the loo symbol of the atom, such as if there wasn't any charges or that minus wasn't even there.
00:36
And so for hydrogen, this is the loo symbol for hydrogen with only one valence electron or one dot.
00:42
And so now we can go ahead and approach how we're going to draw the loo symbol for h minus.
00:47
And so because this minus, we are going to add one electron, so one valence electron.
00:53
And so doing this, we'll add an additional dot to the lewis symbol.
00:59
And so when we are drawing the answer, it's important to also include brackets and then the charge on the top right corner.
01:07
And so this will be our final lewis symbol for hydrogen with a minus charge.
01:12
And so for our next one, we have sn 2 plus.
01:16
And so this is a case where we have a positive charge.
01:21
And so this will indicate the loss of two electrons and two protons are added.
01:31
And so it's important when we're drawing the original one to not focus on that 2 plus charge quite yet.
01:39
And so looking at the number of valence electrons, sn has, you'll see that there are only four.
01:45
And so now when we are drawing the lewis symbol for sn2 plus, we can subtract two electrons because of this charge indicated.
01:57
And so this will be our final lewis symbol.
02:00
We take off two dots.
02:02
We put in the brackets and then we have the 2 plus on the top right corner.
02:06
And so for now potassium or k, we'll go ahead and draw the original lewis structure of potassium, which will include...