00:02
Part a says air and water are both elements.
00:07
This would be false because neither air nor water are elements.
00:14
Water is h2o, which is a compound, and air is a mixture of several different compounds.
00:25
Statement b then says all mixtures contain at least one element and one compound.
00:32
This would be false because we could have mixtures that contain two elements, or two compounds.
00:41
So a mixture does not have to be between elements and compounds.
00:45
It could be just between elements or just between compounds.
00:51
Statement c then says compounds can be decomposed into two or more other substances.
00:58
Elements cannot.
01:00
And this would be true.
01:02
That's because a compound, such as water, can be broken down into hydrogen and oxygen, more specifically with each of these being diatomic.
01:15
And this is the case with all compounds.
01:18
They can all be broken down into at least two or more simpler substances.
01:24
Elements cannot be broken down into anything because they are the simplest form of matter.
01:30
Statement d, elements can exist in any of three states of matter.
01:35
This is true.
01:37
Elements can exist in any three states of matter, just like compounds can exist.
01:42
In the same three states of matter, solid liquids and gases.
01:48
Statement e, when yellow stains in the kitchen sink are treated with bleach, the disappearance of the stains is due to a physical change...
