Chemical Bonds Flashcards
Define Molar mass
Mass in grams of one mole of a certain substance.
Define Electronegativity
A measure of the tendency of an atom to attract a bonding pair of electrons.
Define Ionic bond
Transfer of electrons and subsequent electrostatic attraction.
Define Covalent bond
Sharing of at least one pair of electrons by two atoms.
Define non-polar covalent bond (Pure covalent)
An equal sharing of electrons.
Define Polar covalent bond
Unequal sharing of electrons leading to a dipole forming. This is the result of a difference in electronegativity between the atoms.
Define Metallic bonding
The bond between a positive kernel and sea of delocalized electrons.
Define Bond energy
The amount of energy that is needed to break a specific bond. Bond energy is measured in KJ.mol-1. The higher the bond energy the stronger the bond.
Define Bond length
The distance between the nuclei of two covalently bonded atoms. Double and triple bonds are shorter and stronger than single bonds.