Chemistry Definitions!

This crosword will aim to teach you the definitions you MUST know for AS (and A2 to a lesser extent) Chemistry.

  • Created by: Ed
  • Created on: 15-12-12 19:30
What is the correct definition for: An Isotope?
An atom of an element with a different number of nuetrons than usually expected
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What is the correct definition for: Relative atomic mass?
The mean mass of an elements naturally occuring isotopes relitave to the mass of one twelfth of carbon 12
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What is the correct definition for: Ethalpy change?
The heat energy transferred in a reaction at a constant pressure
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What is the correct definition for: Electronegativity?
The ability to attract the bonding electrons in a covalent bond
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What is the correct definition for: Standard enthalpy of formation?
The enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions
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What is the correct definition for: Standard enthalpy of combustion?
The enthalpy change when 1 mole of a compound is completely burned in oxygen under standard conditions
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What is the correct definition for: Hess' law?
The total enthalpy change of a reaction is independant of the route taken
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What is the correct definition for: A Catalyst?
A substance that increaces the rate of reaction by providing an alternate pathway with a lower activation energy whilst remaning chemically unchanged at the end of the reaction
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What is the correct definition for: Le Chatelier's Principle?
If there is a change in concerntration, pressure or temperature the equilibrium will move to help counteract the change
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What is the correct definition for: The 1st Ionisation energy?
The energy needed to remove one electron from each atom in one mole of gaseous atoms to from one mole of gaseous 1+ ions
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Other cards in this set

Card 2

Front

What is the correct definition for: Relative atomic mass?

Back

The mean mass of an elements naturally occuring isotopes relitave to the mass of one twelfth of carbon 12

Card 3

Front

What is the correct definition for: Ethalpy change?

Back

Preview of the front of card 3

Card 4

Front

What is the correct definition for: Electronegativity?

Back

Preview of the front of card 4

Card 5

Front

What is the correct definition for: Standard enthalpy of formation?

Back

Preview of the front of card 5
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