Atoms

Question 0

What is an atom?

Answer 0

A single type of an element.

Question 1

What happens in the diffusion experiment?

Answer 1

1. Chlorine gas is in the bottom half of a jar with a plate separating it from the air.
2. When the plate is removed the chlorine starts to diffuse
3. After 5 minutes the chlorine gas particles are slowly starting to diffuse to fill the container
4. After half an hour the chlorine has diffused filling the whole container

Question 2

What is a molecule?

Answer 2

When atoms of the same element join together, you get a molecule.

Question 3

How many different types of atoms are there in a compound?

Answer 3

Two or more

Question 4

What is a compound?

Answer 4

A compound contains one or more types of elements chemically combined.

Question 5

What is a mixture?

Answer 5

A mixture contains substances mixed together but not reacted together

Question 6

How do you get salt from salty water?

Answer 6

Evaporation

Question 7

How can you get water from water and inky water?

Answer 7

Simple distillation

Question 8

How do you get salt from a mixture of sand and salt

Answer 8

1. Dissolve mixture in water
2. Filter
3. Then evaporation

Question 9

What method do you use to separate coloured substances from each other?

Answer 9

Chromatography

Question 10

How would you separate four different liquids from each other?

Answer 10

Fractional distillation

Question 11

Pure water can be separated from inky water by simple distillation. Why?

Answer 11

Water and ink have different boiling points