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Flashcards in Chemistry 2 Deck (14):
1

What is fractional distillation and how is it used

Its a process for seperating a liquid from a mixture from two or more liquids this is done by boiling the liquid so one evaporates with its different boiling point

2

What is chromotography and how does it work

Its a method for separating dissolved substances from one another its used for stuff like food colouring becuase different substances dissolve in the solvent

3

What are the three states of matter

Gas (g) liquid (l) solid (s)

4

What is covalent bonding

Covalent bonding is when non metal atoms share their electrons they are joined by weak intermolecular forces

5

What are the properties of diamond and graphite

Diamond is hard clear non metal and doesnt conduct electricity
Groahite is soft slippery grey non metal does conduct electricity

6

Explain structure of diamond

The carbon atoms are bonded to four other atoms and there are no free electrons and it forms a giant lattice covalent structure

7

Explain structure of graphite

Held by weak intermolecular forces each carbon atom is binded to 3 others giving one free delocalised electron

8

What are the properties and structure and uses of fullerenes

They are a molecule made up of 60 carbons which makes a hollow sphere it has been found in different sizes they can be used to help cure some cancers

9

What are the properties and structure of graphene

Its a single layer of graphite it is one atom thick its properties are good electric conductor low density strong flexible

10

What are properties of metals

They are a solid posistive ion charge high melting point some are magnetic

11

What is metallic bonding

Its the electrostatic attraction between positive amd delocalised metal ions they are a giant lattice structure

12

What is the size of nanoparticles

1 nanometer = 1 x 10 -9m

13

What is nanoscience

It is working with nanometers in science

14

Why is the surface area to volume ratio high on nanoparticles

Because the atoms and molecules are found on the surface of the particle