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30 questions
Which is the correct definition for an element?
A substance made up of only one type of atom that can be broken down
Two or more substances that are not chemically combined
Two or more different atoms that are chemically combined
A substance made up of only one type of atom that cannot be broken down
C is the correct chemical symbol for which element?
calcium
copper
carbon
caesium
The smallest part of an element is called...
a compound
a mixture
an element
an atom
Which is the correct definition for a compound?
A substance made up of only one type of atom that can be broken down
Two or more substances that are not chemically combined
Two or more different atoms that are chemically combined
A substance made up of only one type of atom that cannot be broken down
What is the missing word? The properties of a compound are __________ the elements it is made up of.
the same as
different to
Which is correct?
iron and sulfur are both metals
iron and sulfur are both non metals
iron is a non metal and sulfur is a metal
iron is a metal and sulfur is a non metal
What is the correct name for CO?
carbon dioxide
carbon monoxide
cobalt
carbon oxide
Which elements are present in H2SO4?
hydrogen and oxygen
hydrogen, oxygen and sodium
hydrogen, oxygen and sulfur
hydrogen, oxygen and silicon
How many atoms of aluminium are there in the chemical formula for aluminium oxide: Al2O3
2
3
5
1
Which element has the chemical symbol Ni?
nitrogen
nickel
sodium
neon
What is the chemical symbol for copper?
C
Co
Cp
Cu
What is the chemical symbol for gold?
Ag
Go
Gu
Au
Is water an element or a compound?
compound
element
How many different elements are there in Mg(OH)2
2
3
4
5
True or false: Hydrogen atoms go around in pairs called molecules
True
False
What is the name of the compound formed from sodium and chlorine?
sodium chlorine
schloride
sodium chloride
chloride sodium
Water molecules exist as liquid at room temperature. How do molecules of hydrogen and oxygen exist at room temperature?
solid
liquid
gas
A property of sodium is that it fizzes when it reacts with water. What is a property of chlorine?
It is an orange liquid at room temperature
It is a green gas at room temperature
It is a black solid at room temperature
It is a colourless gas at room temperature
What is the correct chemical symbol for iron?
Ir
I
Fe
Fr
The forces that hold molecules of water together are stronger than the forces that hold molecules of oxygen together. This means that water has...
a lower boiling point than oxygen
a higher boiling point than oxygen
the same boiling point as oxygen
This diagram represents...
An element
A molecule
A compound
A mixture of elements and compounds
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