Octet Theory

Question 1

Electron deficient

Answer 1

< 8 electrons

Question 2

Electron precise

Answer 2

8 electrons

Question 3

Electron rich

Answer 3

8 electrons and lone pairs

Question 4

Hypervalent

Answer 4

> 8 electrons

Question 5

Reasons for hypervalency

Answer 5

Expanded octet d-orbital hybridisation allowing more than 8 electrons, MO theory where orbitals are spread out across more than 2 atoms and can accommodate electron pairs