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A* FULL Summary AQA/OCR A-level Chemistry: Transition Metals $14.45   Add to cart

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A* FULL Summary AQA/OCR A-level Chemistry: Transition Metals

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Full summary notes on the mighty ‘transition metals’ topic in A-level Chemistry. Written by an A* student. Simple, neat and easy to understand. Contains everything you need to know for this topic. Suitable for AQA and OCR exam boards. Very detailed and took about 8 hours to make. Affordable pr...

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  • August 31, 2023
  • 18
  • 2023/2024
  • Summary
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Transition Metals
Definition
a metal that can
for one or more stable ions with
an incompleted sub-level.



·
Sc and in aren't transition
metals -

they don'tform any
d-block stable ions with
an
incomplete
d sub-level.

·
S23t: (Ag]
2n27:
[Ag]3d'
·




Chromium and copper


Normally.
· Electrons
occupy singly first
· 4s
fills up before 3d




· Chromium and copper
fill up differently as
they are


more stable that
way.

,Physical Properties
- don’t change gradually across the period as you may expect


1. High density
2. High MP and BP




Chemical Properties
- due to incomplete d sub-level


1. Form complex ions
2. Form coloured ions
3. Good catalysts
4. Have variable oxidation states


Why do transition metals have variable oxidation states?
Different numbers of electrons can be gained/lost with similar amounts of energy because
energies of the 4s and 3d sub-levels are very similar


Why do transition metals make good catalysts?
Because they can transfer electrons by changing oxidation states (they can gain/lose
electrons within their d orbitals)
They provide an alternative pathway with a lower activation energy.

, :palese
":
[CUCL-] yellow/g a series


(COCLy]":blue
Cr2:blue

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