13 - The periodic table - the transition metals

Question 1

oxidised

Answer 1

when there is an increased oxidation number of an element in a reactions

Question 2

reduced

Answer 2

decrease of oxidation number

Question 3

Haber Process (and catalyst)

Answer 3

N2 (g) + 3H2(g) -> 2NH3(g) (catalyst is Fe(s)

Question 4

Decomposition of hydrogen (and catalyst)

Answer 4

2H2O2(aq) ->n 2H2O + O2 (catalyst is MnO2(s)

Question 5

Ligands

Answer 5

ligands are natural molecules or ions that Havel at least one non-bonding pair of electrons that form coordinate bonds with the d-orbitals of transition elements. Both electrons that are shared belong to the ligand. transition metals form complex ions with ligands

Question 6

monodentate

Answer 6

one coordinate bond formed

Question 7

polydentate

Answer 7

more than one coordinate bond formed

Question 8

ferromagnetism

Answer 8

magnetism due to unpaired electrons mainly in Fe (also cobalt and nickel), when there is a magnetic field

Question 9

Paramagetism

Answer 9

magnetism due to unpaired electrons in the presence of a magnetic field. The more unpaired electrons the stronger the paramagnetism

Question 10

diamagnetism

Answer 10

electrons of the transition metal in the complex ion are all paired. has the characteristic of repelling magnetic fields

Question 11

transition metals

Answer 11

metals with and incomplete d-orbital in one ore more oxidation state

Question 12

factors effecting colour of transition metals (3)

Answer 12

identity of transition metal, oxidation number, identity of ligand