Flashcards
F321 Definitions
Cards in this deck (17)
- 1Relative atomic mass (Ar)The average mass of an atom of an element compared with 1/12th the mass of an atom of Carbon-12.
- 2Relative isotopic massThe average mass of an atom of an isotope compared with 1/12th the mass of an atom of Carbon-12.
- 3Relative formula massThe average mass of the formula unit of a compound relative to Carbon-12, that has a mass of 12g.
- 4Molar massThe mass per mole of a substance.
Units: g mol-1 - 5Empirical formulaThe simplest whole number ratio of atoms of each element present in a compound.
- 6Molecular formulaThe actual number of atoms of each element in a molecule.
- 7A moleThe amount of any substance containing as many particles as there are Carbon atoms in exactly 12g if Carbon-12.
- 8IsotopeAtoms of the same element with a different numbers of neutrons and different masses.
- 9First ionisation energyFirst ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms.
- 10Ionic bondStrong electrostatic force of attraction between oppositely charged ions.
- 11Covalent bondA shared pair of electrons between two atoms.
- 12Metallic bondStrong electrostatic attraction between delocalised sea of electrons and positive ions.
- 13Dative covalent bondCovalent bonds which are formed when both electrons are donated by only one of the atoms in the bond.
- 14ElectronegativityThe ability of an atom to attract electrons to itself in a covalent bond.
- 15BlocksElements have their outermost electrons in the sub-shell corresponding to this block letter.
- 16VolatilityThis is the ease with which a liquid turns into a gas.
- 17PeriodicityA trend in properties across each period.
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- A Levels Chemistry (Atoms, Bonds and Groups) Flashcards on F321 Definitions, created by lisalink on 17/02/2015.
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