2/1/26, 7:32 PM AQA A LEVEL Chemistry
AQA A LEVEL Chemistry TEST BANK EXAM LATEST
WITH ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ 100% GUARANTEED
PASS LATEST UPDATE \University of Manchester
Relative atomic mass
The average mass of an atom of an element, relative to 1/12th of the mass
of an atom of Carbon-12
Relative molecular mass
Average mass of a molecule compared to 1/12th of the mass of a carbon-12
atom
The Avogradro constant
the number of particles in a mole
ideal gas equation
pV = nRT
empirical formula
the simplest whole number ratio of atoms of each element in a compound
/ 1/22
,2/1/26, 7:32 PM AQA A LEVEL Chemistry
percentage atom economy
(Mass of desired product/total mass of reactants) x 100
ionic bonding
the electrostatic attraction between oppositely charged ions in a lattice
covalent bond
a shared pair of electrons between non-metal elements
co-ordinate bond
a shared pair of electrons where both electrons are supplied by one atom
repulsion in shapes of molecules
Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair
electronegativity
the power of an atom to attract the pair of electrons in a covalent bond
hess' law
Total enthalpy change for a reaction is independent of the route chosen
/ 2/22
, 2/1/26, 7:32 PM AQA A LEVEL Chemistry
mean bond enthalpy
The energy required to break a covalent bond into gaseous atoms
averaged over different molecules
Bonds broken - bonds made
activation energy
The minimum amount of energy needed to start a chemical reaction
catalyst
A substance that increases the rate of a chemical reaction without being
changed by providing an alternative reaction pathway by lowering
activation energy
Le Chatelier's principle
When a system in dynamic equilibrium is subjected to change, the position
of equilibrium will shift to oppose the change.
oxidising agents
electron acceptors
reducing agents
electron donors
/ 3/22
AQA A LEVEL Chemistry TEST BANK EXAM LATEST
WITH ACTUAL QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+ 100% GUARANTEED
PASS LATEST UPDATE \University of Manchester
Relative atomic mass
The average mass of an atom of an element, relative to 1/12th of the mass
of an atom of Carbon-12
Relative molecular mass
Average mass of a molecule compared to 1/12th of the mass of a carbon-12
atom
The Avogradro constant
the number of particles in a mole
ideal gas equation
pV = nRT
empirical formula
the simplest whole number ratio of atoms of each element in a compound
/ 1/22
,2/1/26, 7:32 PM AQA A LEVEL Chemistry
percentage atom economy
(Mass of desired product/total mass of reactants) x 100
ionic bonding
the electrostatic attraction between oppositely charged ions in a lattice
covalent bond
a shared pair of electrons between non-metal elements
co-ordinate bond
a shared pair of electrons where both electrons are supplied by one atom
repulsion in shapes of molecules
Lone pair-lone pair > lone pair-bonding pair > bonding pair-bonding pair
electronegativity
the power of an atom to attract the pair of electrons in a covalent bond
hess' law
Total enthalpy change for a reaction is independent of the route chosen
/ 2/22
, 2/1/26, 7:32 PM AQA A LEVEL Chemistry
mean bond enthalpy
The energy required to break a covalent bond into gaseous atoms
averaged over different molecules
Bonds broken - bonds made
activation energy
The minimum amount of energy needed to start a chemical reaction
catalyst
A substance that increases the rate of a chemical reaction without being
changed by providing an alternative reaction pathway by lowering
activation energy
Le Chatelier's principle
When a system in dynamic equilibrium is subjected to change, the position
of equilibrium will shift to oppose the change.
oxidising agents
electron acceptors
reducing agents
electron donors
/ 3/22
