bonding, structure and nanoparticles Flashcards
What are the three types of Bonding?
1) ionic
2) Covalent
3) metallic
What occurs during ionic bonding?
Metal and Non Metal
Where do metallic bonds occur?
metal and metal
Where do covalent bonds occur?
non metal and non metal
What 4 Properties of Ionic Bonding
Can conduct electricity when molten
Soluble in water
High melting and boiling point
giant lattice
What are 5 Properties of Covalent Bonding
Low melting and boiling points
Do not conduct electricity
Insoluble in water
easy to break
weak van der waal force between molecules
What are 4 Properties of Metallic
High melting points
Conduct electricity
Mallaeble
Ductile
What is an alloy?
An alloy is a mixture of two or more elements , at least which one of it is a metal
Give 3 Examples of Giant Covalent Structures
Graphite
Graphene
Diamond
What are allotropes
Different forms of the same element are called allotropes
Melting point of Diamond
High
Does diamond conduct electricity
no
Strength of Diamond
Hard
Use of Diamonds
Cutting tools
Structure of Graphite
Carbon atoms are arranged in hexagons
Melting point of Graphite
High
Strength of Graphite
Soft
Use of Graphite
Pencil Leads
Melting Point of Graphene
High
Does Graphene conduct electricity
Yes
Uses of Nanoparticles?
1) provide better skin coverage
2)Gives more effective protection against the ultraviolet radiation from the sun
Risks of Nano Particles
1) Breathing Nano Particles may cause inflammation of lungs
2) Can Cause Cell Damage
Size of Nanoparticles
1-100 nm
Example of Ionic Bonding
Sodium Chloride
What does Nm stand for
Nanometer
Examples of covalent Bonding
Water( Hydrogen and Oxygen)
