Topic 15: Transition metals Flashcards
(19 cards)
a transition metal is
an element that forms one or more stable ions with incompletely filled d-orbitals
a ligand is
a species that uses a lone pair of electrons to form a dative bond with a metal ion
a complex is
a species containing a metal ion joined to ligands
a complex ion is
a complex with an overall positive or negative charge
the coordination number is
the number of dative bonds in the complex
the electromagnetic spectrum is
the range of all wavelengths and frequencies of all the types of radiation
complementary colours are
colours opposite each other on a colour wheel
six-fold coordination refers to
complexes in which there are six ligands forming coordinate bonds with the transition metal ion
a square planar shape contains
contains a central atom or ion surrounded by four atoms or ligands in the same plane and with bond angles of 90 degrees
a monodentate ligand is
one that forms one dative bond with a metal ion
a bidendate ligand is
one that forms two dative bonds with a metal ion
a multidentate ligand is
one that forms several dative bonds with a metal ion
amphoteric behaviour refers to
refers to the ability of a species to react with both acids and bases
a heterogeneous catalyst is
one that is in a different phase from the reactants
adsorption is
the process that occurs when reactants form weak bonds with a solid catalyst
desorption is
the process that occurs when products leave the surface of a solid catalyst
a homogeneous catalyst is
one that is in the same phase as the reactants
autocatalysis occurs when
when a reaction product acts as a catalyst for the reaction
a catalyst is
a substance that increases the rate of a chemical reaction by providing an alternative reaction pathway with lower activation energy, but is chemically unchanged at the end of the reaction
