8E Quick Quiz On your answer sheet, write in or circle the correct letter for each question. 8Ea 1
Which of these things is an element? salt water A B oxygen air C D
2
The number of chemical elements in the world is: A 4. B about 100. about 1000. C over a million. D
3
The element that makes up most of the mass of your body is: A oxygen. carbon. B calcium. C hydrogen. D
4
Chemical elements: are always solids. A are either solids or liquids. B are always gases. C D can be solids, liquids or gases.
8Eb 1
Which of these metals is not a pure element? A gold B copper silver C bronze D
2
The smallest part of an element is called: A B an atom. atom. a molecule. a compound. an ion. C D
3
An element is something that: A can be split up by a chemical reaction. B cannot be split up by a chemical reaction. C is made up of different kinds of atom. is a mixture of atoms and molecules. D
4
The correct way to write the chemical symbol for calcium is A B CA Ca C D ca Ca
Adapted from Exploring Science QCA Copymaster File 8
© Pearson Education Limited 2003
8Ec 1
Which list only contains metals? A copper, gold, silver copper, gold, sulphur B silver, oxygen, iodine C D oxygen, iodine, sulphur
2
Which list contains three typical properties of metals? good conductor of heat, brittle, low melting point A poor conductor of heat, strong, high melting point B good conductor of electricity, strong, high melting point C D poor conductor of electricity, weak, low melting point
3
Which list contains three typical properties of non-metals? good conductor of heat, brittle, low melting point A poor conductor of heat, strong, high melting point B C good conductor of electricity, strong, high melting point D poor conductor poor conductor of electricity, weak, low melting point
4
Where are metallic elements found in the Periodic Table? on the right-hand side A B on the left-hand side C in the top rows only D in the bottom rows only
8Ed 1
A compound contains: only one type of atom. A only one element. B only two elements joined together. C D at least two elements joined together .
2
The smallest particle of water with the formula H2O is called: an ion. A a molecule. B C an element. D an atom.
3
The formula for sulphur dioxide is SO 2. Sulphur dioxide contains: one atom of sulphur and one atom of oxygen. A two atoms of sulphur and two atoms of oxygen. B C one atom of sulphur and two atoms of oxygen. D two atoms of sulphur and one atom of oxygen.
4
The formula of ammonia is NH 3. Which statement is true? An atom of ammonia contains 4 molecules. A B An atom of ammonia contains two different elements. C A molecule of ammonia contains 4 atoms. D A molecule of ammonia contains 4 different elements.
Adapted from Exploring Science QCA Copymaster File 8
© Pearson Education Limited 2003
8Ee 1
The name of the compound that you get when magnesium burns in oxygen is: A magnesium oxide. sodium chloride. B magnesium chloride. chloride . C D sulphuric acid.
2
Water is an example of: an element. A an atom. B a compound. C D an alloy.
3
Which of these word equations is correct? copper + oxygen → copper sulphate A iron + chlorine → iron oxide B C aluminium + iodine → aluminium iodide D sodium + sulphur → sodium hydroxide
4
How many elements are there in the compound iron sulphide? one A B two C three D more than three
Adapted from Exploring Science QCA Copymaster File 8
© Pearson Education Limited 2003
