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AQA GCSE Chemistry
AQA A level Chemistry Revision Questions and Answers
[Meer zien]AQA A level Chemistry Revision Questions and Answers
[Meer zien]Ion 
An atom or group of atoms that has lost or gained electrons and therefore a positive or negative charge. 
Polyatomic ion 
An ion that is made of more then one atom 
Metal ion 
an atom which has lost electrons forming a positive ion 
Non-metal ion 
an atom which has gained electrons forming nega...
Voorbeeld 2 van de 6 pagina's
In winkelwagenIon 
An atom or group of atoms that has lost or gained electrons and therefore a positive or negative charge. 
Polyatomic ion 
An ion that is made of more then one atom 
Metal ion 
an atom which has lost electrons forming a positive ion 
Non-metal ion 
an atom which has gained electrons forming nega...
Transition elements are found 
In the middle block of the periodic tableRe 
Physical properties of transition elements 
Hard, high melthing points, strong and dense. 
Chemical properties of transition elements 
Slow/no reaction with oxygen, water and halogens 
Charges on transition metal ions 
Form ...
Voorbeeld 1 van de 3 pagina's
In winkelwagenTransition elements are found 
In the middle block of the periodic tableRe 
Physical properties of transition elements 
Hard, high melthing points, strong and dense. 
Chemical properties of transition elements 
Slow/no reaction with oxygen, water and halogens 
Charges on transition metal ions 
Form ...
Mixture 
A combination of two or more substances that are not chemically joined. 
Filtration 
Separates insoluble solids from liquids. 
Crystallisation 
The formation of crystals by cooling a saturated solution 
Simple distillation 
Used to separate a liquid from a solution
Voorbeeld 2 van de 10 pagina's
In winkelwagenMixture 
A combination of two or more substances that are not chemically joined. 
Filtration 
Separates insoluble solids from liquids. 
Crystallisation 
The formation of crystals by cooling a saturated solution 
Simple distillation 
Used to separate a liquid from a solution
Requirements for a reaction to take place 
Particles must collide, with sufficient energy 
Activation energy 
Minimum amount of energy required to start a chemical reaction 
Reaction profile diagram 
A graph which shows the change in energy of a chemical reaction 
Products 
The new substances formed...
Voorbeeld 2 van de 5 pagina's
In winkelwagenRequirements for a reaction to take place 
Particles must collide, with sufficient energy 
Activation energy 
Minimum amount of energy required to start a chemical reaction 
Reaction profile diagram 
A graph which shows the change in energy of a chemical reaction 
Products 
The new substances formed...
H - Hydrogen 
He - Helium 
Fe - Iron 
N - Nitrogen 
Na - Sodium 
F - Fluorine 
Li - Lithium 
C - Carbon 
CO2 - carbon dioxide
Voorbeeld 1 van de 2 pagina's
In winkelwagenH - Hydrogen 
He - Helium 
Fe - Iron 
N - Nitrogen 
Na - Sodium 
F - Fluorine 
Li - Lithium 
C - Carbon 
CO2 - carbon dioxide
Metal 
An element that forms positive ions 
pH of metal oxide 
Basic 
Non-metal 
Does not form positive ions 
pH of non-metal oxide 
Acidic 
Reduction in terms of oxygen 
Loss of oxygen 
Oxidation in terms of oxygen 
Gain of oxygen 
Oxidation in terms of electrons 
Loss of electrons
Voorbeeld 2 van de 8 pagina's
In winkelwagenMetal 
An element that forms positive ions 
pH of metal oxide 
Basic 
Non-metal 
Does not form positive ions 
pH of non-metal oxide 
Acidic 
Reduction in terms of oxygen 
Loss of oxygen 
Oxidation in terms of oxygen 
Gain of oxygen 
Oxidation in terms of electrons 
Loss of electrons
Metals 
Elements which form positive ions 
Non-metals 
Elements which do not form positive ions 
Metals position on periodic table 
on the left hand side 
Non-metals position on periodic table
Voorbeeld 2 van de 8 pagina's
In winkelwagenMetals 
Elements which form positive ions 
Non-metals 
Elements which do not form positive ions 
Metals position on periodic table 
on the left hand side 
Non-metals position on periodic table
Formation of metal ions 
Atoms lose outer electrons 
Metals 
Elements that form positive ions 
Formation of non-metal ions 
Atoms gain electrons 
Charge on non-metal ions 
negative 
Group 1 ions charge 
+1 
Group 2 ions charge 
+2 
Group 6 ions charge 
-2 
Group 7 ions charge
Voorbeeld 2 van de 7 pagina's
In winkelwagenFormation of metal ions 
Atoms lose outer electrons 
Metals 
Elements that form positive ions 
Formation of non-metal ions 
Atoms gain electrons 
Charge on non-metal ions 
negative 
Group 1 ions charge 
+1 
Group 2 ions charge 
+2 
Group 6 ions charge 
-2 
Group 7 ions charge
Name of Group 7 elements 
The halogens 
Group 7 elements have similar chemical properties 
because they all have 7 outer shell electrons 
Diatomic molecule 
A molecule consisting of two atoms
Voorbeeld 1 van de 4 pagina's
In winkelwagenName of Group 7 elements 
The halogens 
Group 7 elements have similar chemical properties 
because they all have 7 outer shell electrons 
Diatomic molecule 
A molecule consisting of two atoms
Atom 
Smallest part of an element 
Element 
A pure substance made of only one kind of atom 
Compound 
A substance made up of atoms of two or more different elements joined by chemical bonds 
Mixture 
A combination of two or more different substances that are not joined by chemical bonds
Voorbeeld 2 van de 5 pagina's
In winkelwagenAtom 
Smallest part of an element 
Element 
A pure substance made of only one kind of atom 
Compound 
A substance made up of atoms of two or more different elements joined by chemical bonds 
Mixture 
A combination of two or more different substances that are not joined by chemical bonds
First shell can hold 
2 electrons 
2nd and 3rd shell can hold 
8 electrons 
no of shells = 
Period on the periodic table 
Valence electrons 
Outer shell electrons which are involved in reactions 
No of valence electrons = 
Group number on the periodic table 
Hydrogen electron structure 
1 
Nitrogen ...
Voorbeeld 1 van de 3 pagina's
In winkelwagenFirst shell can hold 
2 electrons 
2nd and 3rd shell can hold 
8 electrons 
no of shells = 
Period on the periodic table 
Valence electrons 
Outer shell electrons which are involved in reactions 
No of valence electrons = 
Group number on the periodic table 
Hydrogen electron structure 
1 
Nitrogen ...
Ancient greek model of the atom 
Atoms are tiny solid spheres which cannot be divided. 
JJ Thompson 
Discovered the electron and developed the "plum-pudding" model of the atom
Voorbeeld 2 van de 7 pagina's
In winkelwagenAncient greek model of the atom 
Atoms are tiny solid spheres which cannot be divided. 
JJ Thompson 
Discovered the electron and developed the "plum-pudding" model of the atom
Relative mass of a proton 
1 
. 
Relative mass of a neutron 
about the same as that of a proton 
Relative mass of an electron 
1/1840 
Relative charge of a proton 
+1 
Relative charge of a neutron 
0 
Relative charge of an electron 
-1 
Neutral atoms 
same number of positive protons as negative elec...
Voorbeeld 2 van de 6 pagina's
In winkelwagenRelative mass of a proton 
1 
. 
Relative mass of a neutron 
about the same as that of a proton 
Relative mass of an electron 
1/1840 
Relative charge of a proton 
+1 
Relative charge of a neutron 
0 
Relative charge of an electron 
-1 
Neutral atoms 
same number of positive protons as negative elec...
Relative mass of a proton 
1 
Relative mass of a neutron 
about the same as that of a proton 
Relative mass of an electron 
1/1840 
Relative charge of a proton 
+1 
Relative charge of a neutron 
0 
Relative charge of an electron 
-1 
Neutral atoms 
same number of positive protons as negative electro...
Voorbeeld 2 van de 7 pagina's
In winkelwagenRelative mass of a proton 
1 
Relative mass of a neutron 
about the same as that of a proton 
Relative mass of an electron 
1/1840 
Relative charge of a proton 
+1 
Relative charge of a neutron 
0 
Relative charge of an electron 
-1 
Neutral atoms 
same number of positive protons as negative electro...
What is the charge of a proton? - +1 
What is the charge of a neutron? - 0 
What is the charge of an electron? - -1 
What is the relative mass of a proton? - 1 
What is the relative mass of a neutron? - 1 
What is the relative mass of an electron? - Very small 
How many types of atoms do elements co...
Voorbeeld 3 van de 29 pagina's
In winkelwagenWhat is the charge of a proton? - +1 
What is the charge of a neutron? - 0 
What is the charge of an electron? - -1 
What is the relative mass of a proton? - 1 
What is the relative mass of a neutron? - 1 
What is the relative mass of an electron? - Very small 
How many types of atoms do elements co...
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