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AS1 CCEA CHEMISTRY

TermDefinition
Molecular Ion Two or more atoms covalently bonded with an overall charge
Avogardo's Constant Number of atoms in 12.000g of carbon-12.
Mole The amount of substance which contains the Avogadro constant of atoms, molecules or groups of ions.
Molar Mass The mass of one mole of substance
Anhydrous (salt) A salt which contains no water of crystallisation
Hydrated (salt) A salt which contains water of crystallisation
Water Of Crystallisation Water chemically bonded within a crystal structure
Atomic Number Number of protons in (the nucleus of) an atom
Mass Number The total number of protons and neutrons in (the nucleus of) an atom
Relative Atomic Mass (RAM) The average (weighted mean) mass of an atom of an element relative to one twelfth of the mass of an atom of carbon-12
Relative Isotopic Mass (RIM) The mass of an atom of an isotope of an element relative to one-twelfth of the mass of an atom of carbon-12.
Isotopes Atoms which have the same atomic number but a different mass number (contain the same number of protons but a different number of neutrons)
Relative Formula Mass (RFM) The average (weighted mean) mass of a formula unit relative to one-twelfth of the mass of an atom of carbon-12.
Relative Molecular Mass (RMM) The average (weighted mean) mass of a molecule relative to one-twelfth of the mass of an atom of carbon-12.
First Ionisation Energy The energy required to convert one mole of gaseous atoms into gaseous ions with a single positive charge.
Second Ionisation Energy The energy required to convert one mole of gaseous ions with a single positive charge into gaseous ions with a double positive charge.
Third Ionisation Energy The energy required to convert one mole of gaseous ions with a double positive charge into gaseous ions with a triple positive charge
Covalent Bond
Co-ordinate (dative) Bond
Octet Rule
Electronegativity
Polar Bond
Delocalised Electrons
Intermolecular
Van Der Waals' Forces
Permanent dipole-dipole attraction
Hydrogen Bonding
Redox
Oxidation
Reduction
Oxidising Agent
Reducing Agent
Disproportionation
Strong Acid / Base
Weak Acid / Base
Molarity
Concentration
Standard Solution A solution for which the concentration is known
Created by: megangrant18