Intermediate 1 Unit 1a Substances 123 4567 89 10 111213 14 15 22 2324 25 26 27 161718192021.
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Intermediate 1 Unit 1a Substances
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Name the two elements which are liquids at room temperature.
Mercury and bromine
Name an element which is a solid
at room temperature.
Iron, copper, zinc, potassium, tin, gold, silver
and many others.
Name an element which is a gas at room temperature.
Oxygen, nitrogen, fluorine, chlorine,
hydrogen
Are there more or less metals than non-metals?
There is more metals.
Give an example of a metal which was one of the first to be discovered
Gold, silver and copper
Which elements show similar chemical properties?
Elements in the same column
What is a compound?
Different atoms
joined together.
What does the ending -ide tell you about a compound?
2 elements joined together
What does the ending -ate/ite indicate about a compound?
Oxygen is present
What is a mixture?
Two or more substances not joined
together
What is the percentage of nitrogen and oxygen in air?
Nitrogen -80%
Oxygen -20%
What is the test for oxygen?
It relights a glowing splint
Why does air not give a positive test for oxygen?
There is not enough oxygen in the air.
What is a solution?
A solution is formed when a substance dissolves in a
liquid.
What term is used to describe a substance which dissolves in a
liquid?
Soluble
What term is used to describe a substance which does not
dissolves in a liquid?
Insoluble
What is a saturated solution?
A solution in which no more solid can be
dissolved.
Which has more substance dissolved in it a concentrated or
dilute solution?
Concentrated
How is a solution diluted?
Add more liquid(water)
Which gas is dissolved in drinks to make them fizzy?
Carbon dioxide gas
What is the test for carbon dioxide gas?
Turns limewater milky
Why is chlorine dissolved in drinking water?
To kill bacteria(germs)
Why is sodium fluoride dissolved in drinking water
To prevent tooth decay
What is the problem with lead compounds being present in
drinking water?
Harmful to health
What does this hazard warning symbol tell you?
Toxic or poisonous
What does this hazard warning symbol tell you?
Flammable / catches fire easily
What does this hazard warning symbol tell you?
Harmful or irritant
Intermediate1 Unit 1a
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