Chemistry: Unit 1 Module 1

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Isotopes
Atoms of the same element with different numbers of neutrons
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Atomic Number
The number of protons in the nucleus
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Mass Number
The number of protons and neutrons in the nucleus
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Ion
A positively or negatively charged atom or groups of atoms
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Relative Isotopic Mass
The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of Carbon-12
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Relative Atomic Mass
The weighted mean mass of an atom of an element compared with one-twelfth of the mas of an atom if Carbon-12
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Relative Molecular Mass
The weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of Carbon-12
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Relative Formula Mass
The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of Carbon-12
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Avogadro Constant
The number of atoms per mole of the Carbon-12 isotope
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Molar Mass
The mass per mole of a substance (g mol-1)
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Empirical Formula
The simplest whole-number ratio of atoms of each element present in a compound
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Molecular Formula
The actual number of each element in a molecule
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Concentration
The amount of solute in mol, dissolved per 1 dm3 of solution
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Species
Any type of particle that takes place in a chemical reaction
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Stoichiometry
The molar relationship between the relative quantities of substances taking part in a reaction
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Acid
A species that is a proton donor
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Base
A species that is a proton acceptor
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Alkali
A type of base that dissolves in water forming Hydroxide ions
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Salt
Any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion
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Cation
A positively charged ion
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Anion
A negatively charged ion
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Oxidation
The loss of electrons or an increase in oxidation number
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Reduction
The gain of electrons or a decrease in oxidation number
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Redox Reaction
A reaction in which both reduction and oxidation take place
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Reducing Agent
A reagent that reduces (adds electrons to) another species
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Oxidising Agent
A reagent that oxidises (takes electrons from) another species
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Hydrated
Refers to a crystalline compound containing water molecules
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Anhydrous
Refers to a crystalline compound that contains no water molecules
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Water of Crystallisation
Water molecules that form an essential part of the crystalline structure of a compound
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Other cards in this set

Card 2

Front

The number of protons in the nucleus

Back

Atomic Number

Card 3

Front

The number of protons and neutrons in the nucleus

Back

Preview of the back of card 3

Card 4

Front

A positively or negatively charged atom or groups of atoms

Back

Preview of the back of card 4

Card 5

Front

The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of Carbon-12

Back

Preview of the back of card 5
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