Chemistry Definistions

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  • Created by: Hannah
  • Created on: 24-04-13 12:21
Anion
A Negatively charged Ion
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Atomic Orbital
A region of an atom that can hold up to two electrons
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Cation
A positively charged ion
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Elector Negativity
A measure of the attraction of a bonded atom for the pair of electrons in the covalent bond
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Electron Shielding
the repulsion between electrons in different inner shells. Shielding reduces the attraction from the nucleus
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Empirical Formula
the simplest whole number ratio of atoms of each element present in a compound
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First Ionisation Energy
The engery required to remove on mole of electrons from one mole of a gasius ion
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Isotopes
Atoms of the same element with different numbers of neutrons and differen masses
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Oxidation Number
A measure of the number of electrons that an atom uses to bond with another atom of other elements
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Relative Atomic Mass
The weighed mean mass of an element compared with one twelth of a Carbon-12 atom
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Sub-Shell
A group of the same type of atomic orbitals (s,d,p,f) within a shell
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Van Der Wall's forces
Very weak attractive forces between induced dipoles in neighbouring molecules
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Dipole
The separation of charges within a molecule between two covalently bonded atoms.
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Covalent Bond
A shared pair of electrons, one electron being supplied by each atom either side of the bond
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Ionic Bond
Oppositely charged ions held together in a crystal lattice by electrostatic attraction
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Card 2

Front

A region of an atom that can hold up to two electrons

Back

Atomic Orbital

Card 3

Front

A positively charged ion

Back

Preview of the back of card 3

Card 4

Front

A measure of the attraction of a bonded atom for the pair of electrons in the covalent bond

Back

Preview of the back of card 4

Card 5

Front

the repulsion between electrons in different inner shells. Shielding reduces the attraction from the nucleus

Back

Preview of the back of card 5
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