Chemistry

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ACID
A species that is a proton donor.
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ALKALI
A type of base that dissolves in water, forming hydroxide ions (OH-).
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ANHYDROUS
A substance that contains no water molecules.
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ANION
Negatively charged ion.
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ATOMIC (PROTON) NUMBER
The number of protons in the nucleus of an atom.
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AVAGADRO CONSTANT
The number of atoms per mole of the carbon-12 isotope (6.02x10²³)
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BASE
A species that is a proton acceptor
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CONCENTRATION
The amount of solute, in mol, dissolved per 1dm³ of solution.
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CATION
Positively charged ion.
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EMPIRICAL FORMULA
Simplest whole-number ratio of atoms of each element present in a compound
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HYDRATED
Crystalline compound containing water molecules.
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ION
Charged ion (covalently bonded) or group of atoms (a molecular ion)
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ISOTOPE
Atoms of the same element with different numbers of neutrons.
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MASS (NUCLEON) NUMBER
Number of particles (protons and neutrons) in the nucleus
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MOLAR MASS
Mass per mole of a substance
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MOLAR VOLUME
Volume per mole of a gas, at RTP the mV is 24dm³
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MOLE
Amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope.
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MOLECULE
Small group of atoms held together by covalent bonds.
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MOLECULAR FORMULA
The actual number of atoms of each element in a molecule
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OXIDATION
Loss of electrons or increase in oxidation number.
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OXIDATION NUMBER
Measure of the number of electrons that an atom used to bond with atoms of another element.
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OXIDISING AGENT
A reagent that oxidises (takes electron from) another species.
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REDOX REACTION
A reaction in which both reduction and oxidation takes place.
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REDUCING AGENT
A reagent that reduces (adds electron to) another species.
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REDUCTION
Gain of electrons or decrease in oxidation number.
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RELATIVE ATOMIC MASS
Weighted 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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RELATIVE FORMULA MASS
Weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12.
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RELATIVE ISOTOPIC MASS
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 MOLECULAR MASS
Weighted mean mass of a molecule compared with one twelfth of the mass of a carbon-12 atom.
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SALT
A chemical compound formed when a H+ ion from an acid has been replaced by a metal ion or another positive ion.
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SPECIES
Any type of particle that takes place in a chemical reaction.
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STANDARD SOLUTION
Solution of a known concentration.
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STOICHIOMETRY
The molar relationship between the relative quantities of substances taking part on a reaction.
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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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Card 2

Front

A type of base that dissolves in water, forming hydroxide ions (OH-).

Back

ALKALI

Card 3

Front

A substance that contains no water molecules.

Back

Preview of the back of card 3

Card 4

Front

Negatively charged ion.

Back

Preview of the back of card 4

Card 5

Front

The number of protons in the nucleus of an atom.

Back

Preview of the back of card 5
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