Which images contain molecules?
A, B, C and D
What is a compound?
A substance made up of atoms of 2 or more elements.
What is a mixture?
A group of substances that are not chemically bonded together.
In which state are the substances shown in the diagrams?
Which images contain 1 type of molecule only and nothing else?
A, C and D
How are properties of the compound H2O (water) different to the properties of its elements?
H2 - hydrogen is a gas
O - oxygen is a gas
H2O - water is a liquid
Are the properties of a compound the same as the properties of the elements that make the compound?
No compounds have different properties compared to their elements.
Salt is a common compound. What is the chemical name for salt?
Which image shows a compound made from 3 different types of element?
Which image shows a mixture?
Which images show compounds?
A and C
Compounds containing 2 elements always end in which suffix?
e.g. sodium + chlorine --> sodium chloride
What is a molecule?
When more than one atom is bonded together.
The diagram below shows some particles of a substance at room temperature.
Explain what the diagram tells you about the substance.