Flashcards
AQA Chem 1 Definitions.
Flashcards do conjunto (26)
- 1Atomic NumberNumber of protons in the nucleus of an atom.
- 2Mass Number.Sum of the protons and neutrons in the nucleus of an atom.
- 3Isotopes.Atoms with the same number of protons but a different number of neutrons.
- 4Empirical Formula.Simplest whole number ratio of the atoms of each element in a compound.
- 5Molecular Formula.Actual number of atoms of each element in a molecule.
- 6Atom Economy.(Mass of desired product / Total mass of reactants) X 100.
- 7Relative Atomic Mass.The average mass of one mole of atoms on the scale where the mass of Carbon-12 is equal to 12.
- 8Relative Molecular Mass.The average mass of a molecule on a scale where the mass of Carbon-12 is equal to 12. Calculated by adding the relative atomic masses of its constituent atoms.
- 9Mole.Unit for amount of substance.
- 10Avogadro Constant, Na.The number of particles present in a mole (6.02 X 10^23.
- 11Lattice.A regular 3-dimensional array.
- 12Ionic Bond.Electrostatic attraction between oppositely charged ions in a lattice.
- 13Covalent Bond.A shared pair of electrons.
- 14Dative Covalent Bond.Covalent bond formed by the donation of a lone pair.
- 15Metallic Bond.A lattice of positive ions surrounded by delocalised electrons.
- 16Electronegativity.Ability of an atom to attract the electrons in a covalent bond.
- 17Polar bond.Electrons are shared unequally (due to difference in electronegativity of atoms at either end).
- 181st Ionisation Energy.Energy change when one mole of electrons is removed from one mole of gaseous atoms.
- 19Homologous Series.A series of organic compounds with;
- the same general formula.
-a trend in physical properties.
-similar chemical properties. - 20Functional Group.A group of atoms responsible for the characteristic reactions of a compound.
- 21Structural Isomers.Compounds with the same molecular formula but different structures.
- 22Hydrocarbon.A compound that contains hydrogen and carbon only.
- 23Saturated.Contains only single C-C bonds.
- 24Fractional Distillation.Separates molecules due to differences in boiling point.
- 25Fraction.Mixture of compounds of a similar boiling point.
- 26Cracking.Breaking a long chain alkane into a shorter chain alkane and an alkene.
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- FlashCards sobre AQA Chem 1 Definitions., criado por HollyM em 19-05-2014.
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- HollyM
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