00:02
Hi there.
00:03
This question is asking about rutherford's gold foil experiment.
00:09
And the gold foil experiment was based upon thompson's model of the atom for that time.
00:18
Thompson proposed the plum pudding model, where the atom itself was a uniformly charged positive sphere with negative electrons embedded in it.
00:42
If we were to name this today, we perhaps call it the chocolate chip cookie model.
00:47
Or the cookie was positively charged, and each of the chocolate chips were the negative electrons.
00:54
Okay, so rutherford fired alpha particles, which are positively charged particles, at the gold foil.
01:12
Since we have positively charged particles and a positively charged sphere, what he expected to happen was that the particles would pass pretty much straight through or be ever so successful.
01:26
Slightly deflected.
01:29
As they hit the positive core, they would be deflected slightly.
01:36
Okay, so that's what he expected.
01:37
Of course, what he saw was something very different, where, yes, some of them passed through, but some were deflected at very large angles, with some even coming straight back at him.
01:49
So kind of bizarre results compared to what he expected.
01:55
All right, so let's look at this answer, though, these answers, though, and see which which ones he expected to happen.
02:01
So we need to select all that apply.
02:04
So the first one, he expected the particles to travel in straight paths through the gold foil.
02:12
All right, yes, he expected some of them to do that.
02:26
All right, let's look at our next statement.
02:30
Expected the particles to reflect from the gold and return the opposite direction...