A repeating pattern in properties of elements across periods of the periodic table
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First ionisation energy
The energy required to remove one electron from each atom in one mole of gaseous atoms of an elements to form one mole of gaseous 1+ ions
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Metallic bonding
The strong electrostatic attraction between cations and delocalised electrons
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Disproportionation
A reaction in which the same element is simultaneously oxidised and reduced, giving two different products
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Enthalpy change of reaction
The enthalpy change that accompanies a reaction in the molar quantities shown in a chemical equation under standard conditions with all reactants and products in their standard states
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Enthalpy change of formation
The enthalpy change that takes place when one mole of a compound is formed from its elements under standard conditions, with all reactants and products in their standard states
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Enthalpy change of combustion
The enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions with all reactants and products in their standard states
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Enthalpy change of neutralisation
The enthalpy change that accompanies the reaction of an acid by a base to form one mole of water, under standard conditions with all reactants and products in their standard states
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Activation energy
The minimum energy required to start a reaction by the breaking of bonds
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Catalyst
A substance that increases the rate of a chemical reaction without being used up in the process; a catalyst provides an alternative route for the reaction and lowers the activation energy
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Homongenous catalysis
A reaction in which the catalyst and reactants are in the same physical state; frequently the aqueous or gaseous state
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Heterogenous catalysis
A reaction in which the catalyst has a different physical state from the reactants; frequently reactants are gases whilst the catalyst is a solid
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Other cards in this set
Card 2
Front
The energy required to remove one electron from each atom in one mole of gaseous atoms of an elements to form one mole of gaseous 1+ ions
Back
First ionisation energy
Card 3
Front
The strong electrostatic attraction between cations and delocalised electrons
Back
Card 4
Front
A reaction in which the same element is simultaneously oxidised and reduced, giving two different products
Back
Card 5
Front
The enthalpy change that accompanies a reaction in the molar quantities shown in a chemical equation under standard conditions with all reactants and products in their standard states
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