C1 Quick Revision Questions. C1 for AQA GCSE examination 2018 onwards
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1 C1 Quick Revision Questions
2 Question 1... of 50 What is an element?
3 Answer 1... of 50 An element is a substance that cannot be broken down chemically.
4 Question 2... of 50 What is a compound?
5 Answer 2... of 50 A compound is a substance that contains at least two different elements, chemically combined in fixed proportions.
6 Question 3... of 50 What is the name of the compound made from sodium and oxygen?
7 Answer 3... of 50 Sodium oxide
8 Question 4... of 50 How many atoms are in the molecule C 4 H 10?
9 Answer 4... of 50 There are 14 atoms in the molecule C 4 H 10
10 Question 5... of 50 Balance the following equation: Mg + O 2 MgO
11 Answer 5... of 50 2Mg + O 2 2MgO
12 Question 6... of 50 Why can mixtures be easily separated?
13 Answer 6... of 50 Mixtures can be easily separated because the chemicals are not joined together.
14 Question 7... of 50 Give 4 examples of separating mixtures
15 Answer 7... of 50 Separation processes include: Filtration, distillation, crystallisation, chromatography
16 Question 8... of 50 How does filtration separate a mixture?
17 Answer 8... of 50 Filtration separates insoluble substances from soluble substances.
18 Question 9... of 50 How does distillation separate liquids?
19 Answer 9... of 50 Distillation separates liquids that have different boiling points.
20 Question of 50 What technique is used to separate the different substances in crude oil?
21 Answer of 50 Fractional distillation is used to separate the different substances in crude oil.
22 Question of 50 Why has the atomic model changed over time?
23 Answer of 50 The atomic model has changed over time because new evidence is discovered which helps to improve the model.
24 Question of 50 What is the relative charge on a proton?
25 Answer of 50 The relative charge on a proton is +1
26 Question of 50 What is the relative charge on an electron?
27 Answer of 50 The relative charge on an electron is -1
28 Question of 50 What is the relative charge on a neutron?
29 Answer of 50 The relative charge on a neutron is 0
30 Question of 50 Where are protons and neutrons found in an atom?
31 Answer of 50 Protons and neutrons are found in the nucleus of an atom.
32 Question of 50 Where are electrons found in an atom?
33 Answer of 50 Electrons are found in electron shells, surrounding the nucleus.
34 Question of 50 An atom is neutral true or false?
35 Answer of 50 True
36 Question of 50 What is the relative mass of an electron?
37 Answer of 50 The relative mass of an electron is
38 Question of 50 What is the relative mass of a proton?
39 Answer of 50 The relative mass of a proton is 1
40 Question of 50 What is the relative mass of a neutron?
41 Answer of 50 The relative mass of a neutron is 1.
42 Question of 50 What is an ion?
43 Answer of 50 An ion is a charged particle.
44 Question of 50 What is the mass number of an atom?
45 Answer of 50 The mass number of an atom is the total number of protons and neutrons.
46 Question of 50 What is the atomic number of an atom?
47 Answer of 50 The atomic number is the number of proton in an atom.
48 Question of 50 What is the atomic number of Carbon?
49 Answer of 50 The atomic number of Carbon is 6
50 Question of 50 What is the mass number of Sodium?
51 Answer of 50 The mass number of Sodium is 23
52 Question of 50 What is an isotope?
53 Answer of 50 Isotopes are atoms with the same number of protons but with a different number of neutrons.
54 Question of 50 What is the symbol for relative atomic mass?
55 Answer of 50 The symbol for relative atomic mass is A r
56 Question of 50 How do you calculate relative atomic mass A r?
57 Answer of 50 A r = (mass of 1st isotope x % of 1 st isotope) (mass of 2 nd isotope x % of 2 nd isotope)
58 Question of 50 What is the definition of relative atomic mass?
59 Answer of 50 Relative atomic mass of an element is the average mass of different isotopes of an element.
60 Question of 50 What is the maximum number of electrons in the first shell of an atom?
61 Answer of 50 There is a maximum of 2 electrons in the first shell of an atom.
62 Question of 50 What is the maximum number of electrons in the 2 nd shell of an atom?
63 Answer of 50 The maximum number of electrons in the 2 nd shell of an atom is 8.
64 Question of 50 Oxygen has an atomic number of 8. What is Oxygen s electronic pattern?
65 Answer of 50 Oxygen s electron pattern is 2,6
66 Question of 50 What are columns in the periodic table known as?
67 Answer of 50 Columns in the periodic table are called groups.
68 Question of 50 What are rows in the periodic table known as?
69 Answer of 50 Rows in the periodic table are known as periods.
70 Question of 50 How many electrons do group 1 elements have in their outer shell?
71 Answer of 50 Group 1 elements have 1 electron in their outer shell.
72 Question of 50 Which Scientist noticed that sometimes three elements had similar properties? He noticed patterns with: Lithium, Sodium and Potassium Calcium, Strontium and Barium Chlorine, Bromine and Iodine
73 Answer of 50 Dobreiner noticed sometimes three elements had similar properties. These are known as Dobreiner triads
74 Question of 50 Which Scientist called their theory the law of octaves
75 Answer of 50 John Newlands said that when he put the elements in atomic weight order there was often a pattern of similar properties every eight elements. He called his theory the law of octaves.
76 Question of 50 Which Scientist left gaps in his version of the periodic table and made predictions about elements that had not yet been discovered? He grouped elements in groups of similar chemical behaviour.
77 Answer of 50 Dmitri Mendeleev left gaps in his version of the periodic table and made predictions about elements that had not yet been discovered.
78 Question of 50 Give 5 physical properties of metals
79 Answer of 50 Metals are: Lustrous Hard Have a high density Have a high tensile strength Have high melting and boiling points Are good conductors of heat Have good electrical conductivity
80 Question of 50 Give 5 physical properties of non-metals
81 Answer of 50 Non-metals are: Dull Soft, brittle or gases Low density Low or no tensile strength or gas Low melting point and boiling point Poor or no thermal conductivity Poor or non conductors of electricity
82 Question of 50 Where are metals found on the periodic table?
83 Answer of 50 Metals are found on the left hand side and centre of the periodic table.
84 Question of 50 Where are non-metals found on the periodic table?
85 Answer of 50 Non-metals are found on the right hand side of the periodic table.
86 Question of 50 What properties do group 0 have in common?
87 Answer of 50 Group 0 are all gases They are all unreactive
88 Question of 50 Why do group 0 elements exist as single atoms?
89 Answer of 50 Group 0 atoms all have 8 electrons in their outer shell so they exist as single atoms.
90 Question of 50 Give the word equation for the reaction between sodium and water
91 Answer of 50 Sodium + water sodium hydroxide + hydrogen
92 Question of 50 What is the trend in reactivity of group 1 as you go down the group?
93 Answer of 50 Group 1 elements get more reactive as you go down the group.
94 Question of 50 What is the trend in reactivity of Group 7 as you go down the group?
95 Answer of 50 The group 7 elements decrease in reactivity as you go down the group.
96 Question of 50 Where are the transition elements found on the periodic table?
97 Answer of 50 The transition elements are found in the middle of the periodic table.
98 Question of 50 Transition elements are often catalysts. What is a catalyst?
99 Answer of 50 Catalysts change the rate of a chemical reaction without taking part in the reaction as a reactant. Catalysts are unchanged by the reaction.
100 Question of 50 What does Fe(II) mean?
101 Answer of 50 Fe(II) means that iron has lost two electrons to make a 2+ ion
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