Chemistry

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  • Created by: 10apples
  • Created on: 17-01-15 18:29
Isotope
Atoms of the same element with different numbers of neutrons
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Ion
A positively or negatively charged atom or group of atoms.
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Relative Isotopic Mass
The mass of an atom of an isotope compared to 1 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 1 twelfth of the mass of an atom of carbon 12.
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Relative Molecular Mass
The weighted mean mass of a molecule compared with 1 twelfth of the mass of carbon 12.
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Relative Formula Mass
he weighted mean mass of a formula unit compared with 1 twelfth of the mass of carbon 12.
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The Avogadro Constant
The number of atoms per mole of the carbon 12 isotope - 6.02x10^23 mol^-1
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Mole
The amount of any substance containing as many particles as there are carbon atoms in exactly 12 grams of the carbon 12 isotope.
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Empirical Formula
The simplest whole number ratio
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Stoichiometry
The molar relationship between the relative quantities of substances taking part in a reaction.
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Acid
Proton donor
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Base
Proton acceptor
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Alkali
A type of base the 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Any chemical compound formed from an acid when a H+ ion from the acid has been replaced by a metal ion or another positive ion.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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Water of Crystallisation
Refers to water molecules that form an essential part of the crystalline structure of a compound.
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Oxidation
Loss of electrons
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Reduction
Gain of electrons
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Redox Reaction
A reaction in which both reduction and oxidation take place.
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First Ionisation Energy
The energy required to remove 1 electron from each atom in 1 mole of gaseous atoms of gaseous 1+ ions.
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Electron Sheilding
The repulsion between electrons between different inner shells.
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Second Ionisation Energy
The energy required ot remove 1 electron from each ion in 1 mole of gaseous 1+ ions to form 1 mole of gaseous 2+ ions.
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Atomic Orbital
A region within an atom that can hold up to 2 electrons with opposite spins.
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Ionic Bond
The electrostatic attraction between oppositely charged ions.
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Covalent Bond
A bond formed by a shared pair of electrons.
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Dative Covalent/Coordinate Bond
Shared pair of electrons which has been provided by one of the bonding atoms only.
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Electronegativity
A measure of the attraction of a bonded atom for the pair of a electrons in a covalent bond.
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Permanent Dipole
A smal charge difference across a bond that results from a difference in the electronegativities of the bonded atoms.
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Intermolecular Force
An attractive force between neighbouring molecules.
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Permanent Dipole - Dipole Force
A weak attractive force between permanent dipole in neighbouring polar molecules.
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Van Der Vaals Forces
Attractive forces between induced dipoles in neighbouring molecules.
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Hydrogen Bond
Strong Dipole - Dipole attraction between an electron deficient Hydrogen atom on 1 molecule and a lone pair of electrons on a highly electronegative atom on a different molecule.
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Metallic Bonding
The electrostatic attraction between the positive metal ions and delocalised electrons.
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Periodicity
A regular periodic variation of properties of elements with atomic number and position.
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Displacement Reaction
A more reactive element displaces a less reactive element from an aqueous solution of the latters.
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Disproportionation
The oxidation and reduction of the same element in a redox reaction
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Precipitation Reaction
The formation of a solid from a solution during a chemical reaction.
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Other cards in this set

Card 2

Front

Ion

Back

A positively or negatively charged atom or group of atoms.

Card 3

Front

Relative Isotopic Mass

Back

Preview of the front of card 3

Card 4

Front

Relative Atomic Mass

Back

Preview of the front of card 4

Card 5

Front

Relative Molecular Mass

Back

Preview of the front of card 5
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