Chemistry Unit 1 Module 1 Definitions (OCR)

This is only for Module 1 and is what the specification says we need to know :D

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Isotopes
Atoms of the same elements with different number of neutrons.
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Relative Isotopic Mass
Mass of an atom of an Isotope compared with one-twelfth of an atom of carbon-12
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Relative Atomic Mass
Weighed mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12
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Amount Of Substance
Quantity whose unit is the mole, used to count atoms
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Mole
Amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12
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Avogadro Constant
The number of atoms per mole of the carbon-12 isotope
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Empirical Formula
Simplest whole-number ratio of an atom of each element present in a compound
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Concentrated
Large amount of solute per dm3
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Dilute
Small amount of solute per dm3
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Acid
Proton Donor (H+ donor)
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Base
Proton Accepter (H+ acceptor)
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Salt
Produced when H+ ion of an acid is replaced by another positive ion
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Anhydrous
substance contains no water
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Hydrous
Crystalline compound containing water molecules
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Water of Crystalline
Water molecule that forms an essential part of a crystalline structure of a compound
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Oxidation
Loss of electrons, increase in oxidation number
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Reduction
Gain of electrons, decrease in oxidation number
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Redox Reaction
Reaction where oxidation and reduction take place
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Other cards in this set

Card 2

Front

Mass of an atom of an Isotope compared with one-twelfth of an atom of carbon-12

Back

Relative Isotopic Mass

Card 3

Front

Weighed mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12

Back

Preview of the back of card 3

Card 4

Front

Quantity whose unit is the mole, used to count atoms

Back

Preview of the back of card 4

Card 5

Front

Amount of any substance containing as many particles as there are carbon atoms in exactly 12g of carbon-12

Back

Preview of the back of card 5
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