Please enable JavaScript.
Coggle requires JavaScript to display documents.
Transition Elements - Coggle Diagram
Transition Elements
Physical properties
when the metals are clean, they are shiny and silvery
good conductors of electricity
hard and strong - metallic bonds are strong
high densities and high melting points
suitable for use as filaments for light bulbs
Copper sulphate reactions:
sodium hydroxide added - foggy dark blue
ammonia added - foggy light blue
potassium iodide added - instant change to green then caramel
Chemical properties
variable valency
several transition metals and their compounds are good catalysts (speed up reactions)
General Properties
right to left - reactivity increases
left to right - boiling/melting points and hardness increases
Chromium chloride reactions:
sodium hydroxide added - solution turned light green, then grey and then dark green
ammonia added - change to dark green
hydrogen peroxide added - brown and bubbled
Cobalt Chloride reactions:
sodium hydroxide added - change to a peach orange then a dark blue
ammonia added - bright pink
hydrogen peroxide added - dark green and bubbled
Nickel sulphate reactions:
sodium hydroxide added - foggy light green
ammonia added - foggy turquoise
Transition vs Alkali
transition metals have a higher melting and boiling point than alkali metals
transition metals are less reactive than alkali metals
transition metals are stronger and harder than Alkali metals