GCSE AQA Chemistry ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS /GET IT 100%
ACCURATE|ALREADY GRADED A+
Draw and label an atom - correct answer Protons
Neutrons
Electrons
What are the masses and charges of these parts of an atom?
• Proton
• Neutron
• Electron - correct answer Protons = +ve
(mass 1)
Neutrons = neutral
(mass 1)
Electrons = -ve
(mass 1/2000th)
Why do atoms usually have no overall electrical charge? - correct answer Atoms usually have
no overall charge because they have equal numbers of protons (+ve) and electrons (-ve), which
cancel one another out
All atoms of a particular element (e.g. carbon) all have the same number of what? - correct
answer Protons
What does relative atomic mass tell you about the atom? - correct answer The number of
protons and neutrons in the atom
What does atomic number tell you about the atom? - correct answer The number of protons
(usually the same as the number of electrons)
What is an isotope? - correct answer An isotope is an atom with a different amount of neutrons
How many electrons can occupy the 1st and 2nd shell (energy level) of an atom? - correct
answer 2 in the 1st shell and 8 in the 2nd shell
The electron structure of sodium can be represented as 2,8,1 - what does this mean?
,GCSE AQA Chemistry ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS /GET IT 100%
ACCURATE|ALREADY GRADED A+
Represent these atoms: -
• Fluorine
• Oxygen
• Potassium
• Magnesium - correct answer 2,8,1 means 2 electrons in the 1st shell, 8 electrons in the 2nd
shell and 1 electron in the 3rd shell
Fluorine = 2,7
Oxygen = 2,6
Potassium = 2,8,8,1
Magnesium = 2,8,2
Define these terms: -
• Element
• Compound
• Mixture - correct answer Element - a pure substance made from 1 type of atom only
Compound - 2 or more elements chemically bound
Mixture - 2 or more elements or compounds mixed together which are not chemically bound
What happens to the electrons of 2 atoms when they chemically react? - correct answer During
a chemical reaction electrons are either given away, taken, or shared
What is an ion?
How are +ve ions formed?
, GCSE AQA Chemistry ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS /GET IT 100%
ACCURATE|ALREADY GRADED A+
How are -ve ions formed? - correct answer An ion is an atom with a charge
+ve ions have lost electrons
-ve ions have gained electrons
Explain how the following atoms become ions (will they be +ve or -ve)?
• Potassium
• Magnesium
• Chlorine
• Oxygen - correct answer Potassium - loses 1 electron (K+)
Magnesium - loses 2 electrons (Mg2+)
Chlorine - gains 1 electron (Cl-)
Oxygen - gains 2 electrons (O2-)
Describe the structure of ionic compounds - correct answer Ionic compounds have a giant
structure - they are bonded to 6 other ions by electrostatic bonds
What are the melting and boiling points of ionic compounds like?
Why is this? - correct answer Ionic compounds have high melting points and boiling points - to
melt them you have to supply enough energy to break the 6 bonds attached to each ion
What happens to the electrons when atoms form ionic bonds and covalent bonds?
Which is the strongest? - correct answer Ionic bonds - 1 atom loses electrons and another gains
electrons
ACCURATE|ALREADY GRADED A+
Draw and label an atom - correct answer Protons
Neutrons
Electrons
What are the masses and charges of these parts of an atom?
• Proton
• Neutron
• Electron - correct answer Protons = +ve
(mass 1)
Neutrons = neutral
(mass 1)
Electrons = -ve
(mass 1/2000th)
Why do atoms usually have no overall electrical charge? - correct answer Atoms usually have
no overall charge because they have equal numbers of protons (+ve) and electrons (-ve), which
cancel one another out
All atoms of a particular element (e.g. carbon) all have the same number of what? - correct
answer Protons
What does relative atomic mass tell you about the atom? - correct answer The number of
protons and neutrons in the atom
What does atomic number tell you about the atom? - correct answer The number of protons
(usually the same as the number of electrons)
What is an isotope? - correct answer An isotope is an atom with a different amount of neutrons
How many electrons can occupy the 1st and 2nd shell (energy level) of an atom? - correct
answer 2 in the 1st shell and 8 in the 2nd shell
The electron structure of sodium can be represented as 2,8,1 - what does this mean?
,GCSE AQA Chemistry ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS /GET IT 100%
ACCURATE|ALREADY GRADED A+
Represent these atoms: -
• Fluorine
• Oxygen
• Potassium
• Magnesium - correct answer 2,8,1 means 2 electrons in the 1st shell, 8 electrons in the 2nd
shell and 1 electron in the 3rd shell
Fluorine = 2,7
Oxygen = 2,6
Potassium = 2,8,8,1
Magnesium = 2,8,2
Define these terms: -
• Element
• Compound
• Mixture - correct answer Element - a pure substance made from 1 type of atom only
Compound - 2 or more elements chemically bound
Mixture - 2 or more elements or compounds mixed together which are not chemically bound
What happens to the electrons of 2 atoms when they chemically react? - correct answer During
a chemical reaction electrons are either given away, taken, or shared
What is an ion?
How are +ve ions formed?
, GCSE AQA Chemistry ACTUAL EXAM QUESTIONS AND VERIFIED ANSWERS /GET IT 100%
ACCURATE|ALREADY GRADED A+
How are -ve ions formed? - correct answer An ion is an atom with a charge
+ve ions have lost electrons
-ve ions have gained electrons
Explain how the following atoms become ions (will they be +ve or -ve)?
• Potassium
• Magnesium
• Chlorine
• Oxygen - correct answer Potassium - loses 1 electron (K+)
Magnesium - loses 2 electrons (Mg2+)
Chlorine - gains 1 electron (Cl-)
Oxygen - gains 2 electrons (O2-)
Describe the structure of ionic compounds - correct answer Ionic compounds have a giant
structure - they are bonded to 6 other ions by electrostatic bonds
What are the melting and boiling points of ionic compounds like?
Why is this? - correct answer Ionic compounds have high melting points and boiling points - to
melt them you have to supply enough energy to break the 6 bonds attached to each ion
What happens to the electrons when atoms form ionic bonds and covalent bonds?
Which is the strongest? - correct answer Ionic bonds - 1 atom loses electrons and another gains
electrons
