RCH₂X > R₃CX > R₂CHX

RCH₂X > R₂CHX > R₃CX

R₃CX > R₂CHX > RCH₂X

R₂CHX > R₃CX > RCH₂X

[CoCl₄]^2-

[FeCl₄]^2-

[NiCl₄]^2-

[PtCl₄]^2-

d-Block elements show irregular and erratic chemical properties among themselves

La and Lu have partially filled d orbitals and no other partially filled orbitals

The chemistry of various lanthanoids is very similar

4f and 5f orbitals are equally shielded

Potassium nitrate

Urea

Superphosphate of lime

Ammonium sulphate