Chemistry Unit 1 Module 1 Definitions (OCR)

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Created by: allywayland
Created on: 01-02-14 00:20

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

Card 4

Front

Quantity whose unit is the mole, used to count atoms

Back

Card 5

Front

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

Back

View more cards

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Chemistry Unit 1 Module 1 Definitions (OCR)