Chemistry Keywords Module 2

Card Set Information

Chemistry Keywords Module 2
2013-11-08 13:18:26
Chemistry Keywords

Keywords For AS Chemistry Module 2
Show Answers:

  1. Cation
    A positively charged ion
  2. Coordinate Bond/ Dative Covalent Bond
    A shared pair of electrons which has been provided by one of the bonding atoms.
  3. Covalent Bond
    A bond formed by a shared pair of electrons
  4. Delocalised Electrons
    Electrons that are shared between more than two atoms
  5. Electron Configuration
    The arrangement of electrons in an atom
  6. Electronegativity
    A measure of the attraction of a bonded atom for the pair of electrons in a covalent bond
  7. Electron Shielding
    The repulsion between electrons in different inner shells. Shielding reduces the net attractive force from the positive nucleus on the outer-shell of electrons.
  8. Giant Covalent Lattice
    A 3-D structure of atoms bonded together by strong covalent bonds
  9. Giant Ionic Lattice
    A 3-D structure of oppositely charged ions bonded together by strong ionic bonds
  10. Giant Metallic Lattice
    A 3-D structure of positive ions and delocalised electrons bonded together by strong metallic bonds.
  11. Group
    A vertical column in the Periodic Table. Elements in a group have similar properties and their atoms have the same number of outer electrons
  12. Hydrogen Bond
    A strong dipole-dipole attraction between an electron-deficient hydrogen atom on one molecule and a lone pair of electrons on a highly electronegative atom on a different molecule
  13. Intermolecular Force
    An attractive force between neighboring molecules. Intermolecular force can be van der Waals' forces, permanent dipole-dipole forces or hydrogen bond.
  14. Ion
    A positively or negatively atom or group of atoms
  15. Ionic Bond
    The electrostatic attraction between oppositely charged ions
  16. First Ionisation Energy
    The energy required to remove one electron from each atom in on mole of gaseous atoms to form on mole of gaseous 1+ ions
  17. Lone Pair
    An outer shell pair of electrons that is not involved in chemical bonding
  18. Metallic Bonding
    The electrostatic attraction between positive metal ions and delocalised electrons
  19. Period
    A horizontal row of elements in the Periodic Table. Elements show trends in properties across period
  20. Permanent Dipole
    A small charge difference across a bond resulting from a difference in electronegativities of the bonded atoms.
  21. Permanent dipole-dipole force
    A attractive force between permanent dipoles in neighboring polar molecules
  22. Polar Covalent Bond
    A bond with a permanent dipole
  23. Polar molecule
    A molecule with an overall dipole taking into account any dipoles across bonds.
  24. Principal quantum number, n
    A number representing the relative overall energy of each orbital, which increases with distance from the nucleus. The sets of orbitals with the same n value are referred to as electron shells or energy levels
  25. Salt
    A chemical compound formed from an acid, when a H+ ion from the acid has been replaced by a metal ion or another positive ion
  26. Shell
    A group of atomic orbitals with the same principle quantum number n. Also known as a main energy level.
  27. Simple molecular lattice
    A 3-D structure of molecules bonded together by weak intermolecular forces
  28. Sub-shell
    A group of the same type of atomic orbitals within a shell
  29. Van der Waals' forces
    Very weak attractive forces between induced dipoles in neighboring molecules
  30. Water of Crystallisation
    Water molecules that form an essential part of the crystalline structure of a compound
  31. Atomic Orbital
    A region within a atom that can hold up to two electrons with opposite spins