3.3

Question 1

Inert pair effect

Answer 1

The tendancy for the outer pair of s electrons to remain inert so that they do not take part in bonding and divalent (2+ ion) compounds become more stable

Question 2

What is amphoteric?

Answer 2

When a substance act as acids and bases

Question 3

Name 3 electron defficient compounds

Answer 3

BF3
BCl3
AlCl3

Question 4

Boron Nitrate nanotubes properties

Answer 4

• High bp
• cheep
• light
• excelent thermal and chemical stability
• eletrical insulator

Question 5

A good use for BN nanotubes

Answer 5

pinpoint presisions to attack cancer cells by sticking to tumor absorbing the neutrons

Question 6

Use for h-BN

Answer 6

• Makeup
• Ceramics (china)
• alloys

Question 7

Use for c-BN

Answer 7

Tool bits

Question 8

Hexagonal BN

Is Boron electron rich or electron difficient?

Answer 8

Electron difficient

Question 9

Hexagonal BN

Is Nitrogen electron rich or electron difficient?

Answer 9

Electron rich
(has lone pairs)

Question 10

What is cubic BN sutructure similar to?

Answer 10

Diamond

Question 11

What is hexagonal BN sutructure similar to?

Answer 11

Graphite

Question 12

Why can Carbon form 4 bonds?

Answer 12

4 bonds can be formed due to promotion of an s electron into a p orbital and formation of sp3 hybrid orbitals