00:02
Hi there.
00:03
In this question, we are trying to describe the substance we see in the picture here.
00:08
And we see that the particles are arranged very orderly.
00:20
So this tells us that it must be a solid.
00:24
Because while particles of a liquid are touching, they are not in an orderly arrangement like that.
00:31
They are kind of randomly arranged even though they're touching each other still.
00:35
So since this is arranged orderly, it's a solid.
00:38
So that leaves us with answer choices.
00:40
C, d, or e.
00:43
So it's either a solid compound, a solid mixture, or a solid element.
01:09
Okay, so when we are using solid spheres to try to give us a picture, try to model atoms and molecules, we will typically choose different colors and different sizes to represent different elements.
01:25
So we know a compound is two or more elements chemically combined.
01:41
So looking at this picture, it is not suggesting that we have two different elements there.
01:48
So this is not going to be a compound.
01:53
Okay, a mixture is just a combination, again, of two or more pure substances.
02:06
So it can be two or more elements, two or more compounds, or a mixture of elements and compounds.
02:15
Again, this photo or this diagram, this model, i guess, is only showing one type of atom.
02:27
So it does not appear to be trying to show us a mixture.
02:32
What it is does appear to be showing us is an element because an element is composed of one type of atom...