1.2 - 11-16 Flashcards
What is a permanent dipole?
A small charge difference across a bond that results from a difference in the electronegativities of the bonded atoms.
What does a polar covalent bond have?
A permanent dipole.
What is a polar molecule?
A molecule that has an overall dipole when taking into account dipoles across the bonds.
What is an intermolecular force?
An attractive force between neighbouring molecules.
What is a permanent dipole-dipole force?
A weak attractive force between permanent dipoles in neighbouring polar molecules.
What are Van der Waals’ forces?
Attractive forces between induced dipoles in neighbouring molecules.
What is a 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 (oxygen, fluorine or nitrogen).
What is metallic bonding?
The electrostatic attraction between positive metal ions and delocalised electrons.
What are delocalised electrons?
Electrons shared between more than two atoms.
What is a giant metallic lattice?
A three dimensional structure of positive ions and delocalised electrons, bonded together by strong metallic bonds.
What is a simple molecular lattice?
A three dimensional structure of molecules, bonded together by weak intermolecular forces.
What is a giant covalent lattice?
A three dimensional structure of atoms, bonded together by strong covalent bonds.
What is electronegativity?
A measure of the attraction of a bonded atom for the pair of electrons in a covalent bond.
