Elements and compounds

Question 1

What is an element?

Answer 1

An element is a substance that only contains one type of atom

Question 2

What is a compound?

Answer 2

A compound is a substance that is made of more than one type of atom chemically bonded together

Question 3

What is a mixture?

Answer 3

A mixture is a substance containing two or more different types of element that are not chemically bonded together

Question 4

How do you know that a substance is an element?

Answer 4

You can find it on the periodic table

Question 5

What does the periodic table show us?

Answer 5

The periodic table shows us all of the element that exist

Question 6

What is the difference between the elements in red and the elements in yellow on this periodic table

Answer 6

The elements in red are metals and the elements in yellow are non-metals

Question 7

What process do you need to perform to turn a mixture of atoms into a compound?

Answer 7

A chemical reaction

Question 8

What are the main properties of metals?

Answer 8

They are not brittle (they bend)

They are shiny

They contuct heat easily

They conduct eletricity

Some of them are magnetic

Question 9

What is the main difference between a mixture and a compound?

Answer 9

A mixture can be seperated but a compound cannot be.

Question 10

Is this substance an element, compound or a mixture?

Explain why you think this

Answer 10

This is a mixture

You know this is a mixture becuase there are different types of atom not chemically bonded together

Question 11

Is this substance an element, mixture of compound?

Explain why you think this is

Answer 11

This is a compound

You know this is a compound becuase there are two different types of atom and they are chemically bonded together

Question 12

Is this substance an element, mixture or compound?

Explain why you think this is

Answer 12

This is a compound

You know this is a compound becuase there are two different types of atom that are chemically bonded together.

Question 13

Is this substance an element, mixture or compound?

Explain why you think this is

Answer 13

This is an element

You know this is an element becuase there is more than one type of atom chemically bonded together

Question 14

Is this substance an element, mixture or compound?

Explain why you think this is

Answer 14

This is an element

You know this is an element becuase there is only one type of atom

Question 15

Why are the properties of a compound different to the properties of the elements that make them up

Answer 15

This is becuase the chemical bonds change the way that the atoms in the material behave

Question 16

What method do you use to seperate an undissolved solid from a liquid?

Answer 16

Filtration

Question 17

What method do you use to get a dissovled solid out of a liquid?

Answer 17

Evaporaiton

Question 18

What do you use to seperate a metal from a non-metal?

Answer 18

A magnet

Question 19

What method do you use if you want to seperate two liquids from each other and keep both of them?

Answer 19

Distillation

Question 20

What method do you use to seperate two liquids of different densities (so one of them floats on the other)

Answer 20

Pouring off

Question 21

Is this substance a compound, mixture or element?

What is its name?

Answer 21

This is a compound becuase it has more than one type of atom chemically bonded together

It is water (hydrogen oxide)

Question 22

Is this substance a compound, element or mixture?

What is its name?

Answer 22

This is a compound because there is more than one type of atam chemically bonded toegether

It is called carbon dioxide (becuase it has one carbon and two oxygens)

Question 23

Is this substance a compound, element or mixture?

What is its name?

Answer 23

This is an element becuase it only has one type of atom

It is called oxygen