Transition Elements 5.3.1 Flashcards
What is a Transition Element?
Elements that have one or more stable ion with partially filled d sub-shells
What are properties of Transition Metals?
High melting point High boiling point Denser than s-block Conductive Poscess strong metallic bonds
What happens when Transition Elements react?
They lose electrons from the 4s sub-shell first
Are Sc and Zn Transition Elements?
No because they don’t form ions with partially filled d sub-shells
What colour are Chromium ions?
3+:
Green
6+:
Orange (seen in dichromate)
What colour are Manganese ions?
2+:
Pink
What colour are Iron ions?
2+:
Green
3+:
Orange
What colour are Copper ions?
2+:
Blue
Define adsorption?
When something sticks to the surface of a material
Define absorption?
When something when something enters another material
How does Iron act as a catalyst for the Haber Process?
Iron offers an alternative path of reaction.
1) H2 and N2 are adsorbed onto the surface of the iron.
2) H-H and N-N bonds weaken.
3) Bonds are formed between H and N
4) Ammonia molecule desorbs from the iron
Examples of Catalysts and their reactions?
2SO3 + O2 ⇌ 2SO3
Uses V2O5 as a catalyst
Alkene +H2 → Alkane
Uses a Nickel or Platinum catalyst
What is a Complex Ion?
A Complex ion consists of a central positive ion surrounded by ligands
What is a Ligand?
A species that can donate one or more lone pairs to form diative bonds
What is a Co-ordination Number?
The number of diative bonds formed in a complex ion
