Periodic Table - Transition Metals

Question 1

Physical properties of transition metals (6)

Answer 1

1. very high mp/bp
2. high densities
3. very hard and strong
4. shiny, silvery
5. good conductors of heat and electricity
6. malleable, ductile

Question 2

properties of transition metals (3)

Answer 2

1. form ions with variable oxidation state (except Ag⁺, Zn²⁺)
2. most form coloured compounds (all silvery grey, except copper - reddish-brown, gold - gold)
3. used as catalysts

Question 3

examples of the 3 properties of transition metal
2. (5) name, formula, state, colour

grp I to III?

Answer 3

1. variable oxidation state
2. coloured compounds
   - Copper(II) sulfate CuSO₄ (s/aq) blue
   - iron(II) chloride FeCl₂ (s/aq) pale green
   - iron(III) chloride FeCl₃ (s/aq) yellow
   - potassium manganate(VII) KMnO₄ (s/aq) purple –> Mn²⁺ colourless
   - potassim dichromate (VI) K₂Cr₂O₇ (s/aq) orange

variable oxidation state -> different colour
grp I to III, white (s), colourless (aq)

3. catalyst
   manganese (IV) oxide –> catalyst
   hydrogen peroxide –> water + oxygen
   - laboratory preparation of oxygen