Structure 2.2.7-Covalent Network Structures

Question 1

What are Allotropes

Answer 1

Allotropes are different structural forms of the same element in the same physical state.

Question 2

Allotropes of carbon

Answer 2

Diamond, Graphite, and graphene

Question 3

What is the key difference between different allotropes

Answer 3

Their properties vary due to different atomic arrangement

Question 4

Define Covalent Network Sturcutre

Answer 4

Covalent Network Sturcture refers to a continuous lattice where atoms are connected by covalent bonds extending in three dimensions

Question 5

What are some characteristics of covalent Network Structures

Answer 5

They have strong bonds throughout the entire structure

Question 6

What are some properties of covalent Network structure (as a result of its strong bonds throughout the entire structure)

Answer 6

Very high melting points and varying electrical properties

Question 7

Structure of Diamond

Answer 7

• each carbon atom forms sp^3 hybrid orbitals
• tetrahedral geometry with bond angles of 109.5
  *four covalent bonds per carbon atom
  *Thermal conductivity: Highest of any natural material
  *Electrical resistance: Very high (insulator)

Question 8

Structure of Graphite

Answer 8

*Carbon atoms in sp^3 hybridization
Hexagonal rings in planar layers
Bond angles: 120° within layers