Topic 2: Chemical bonding and structure Flashcards
delocalised electrons are
electrons that are not associated with any single atom or single covalent bond
metallic bonding is
the electrostatic force of attraction between the nuclei of metal cations and delocalised electrons
bond length is
the distance between nuclei of the two atoms that are covalently bonded together
electronegativity is
the ability of an atom to attract a bonding pair of electrons in a covalent bond
a polar covalent bond is
a type of covalent bond between two atoms where the bonding electrons are unequally distributed. because of this, one atom carries a sight negative charge and the other a slight positive charge
a discrete (simple) molecule is
an electrically neutral group of two or more atoms held together by chemical bonds
a displayed (full structural) formula shows
each bonding pair as a line drawn between the two atoms involved
a dipole is said to exist when
two charges of equal magnitude but opposite charges are separated by a small distance
the hydrogen bond is
an intermolecular interaction (in which there is some evidence of bond formation) between a hydrogen atom of a molecule (or molecular fragment) bonded to an atom which is more electronegative than hydrogen (nitrogen, oxygen or fluorine) and another atom in the same or a different molecule
