Elements, Compounds And Mixtures

Question 0

Draw a diagram of an atom of an element.

Answer 0

Check book for answers

Question 1

What is an element?

Answer 1

An element is a material that cannot be split into anything simpler by chemical methods. They contain only one type of atom.

Question 2

Draw a diagram of a molecule of an element.

Answer 2

Check book for answers

Question 3

What is an atom?

Answer 3

An atom is the simplest particle of an element that can exist on it’s own

Question 4

What is a molecule?

Answer 4

A molecule has 2 or more atoms joined together

Question 5

What is the symbol for hydrogen?

Answer 5

H

Question 6

What is the symbol for lithium?

Answer 6

Li

Question 7

What is the symbol for sodium?

Answer 7

Na

Question 8

What is the symbol for potassium?

Answer 8

K

Question 9

What is the symbol for magnesium?

Answer 9

Mg

Question 10

What is the symbol for calcium?

Answer 10

Ca

Question 11

What is the symbol for barium?

Answer 11

Ba

Question 12

What is the symbol for aluminium?

Answer 12

Al

Question 13

What is the symbol for iron?

Answer 13

Fe

Question 14

What is the symbol for silver?

Answer 14

Ag

Question 15

What is the symbol for carbon?

Answer 15

C

Question 16

What is the symbol for silicon?

Answer 16

Si

Question 17

What is the symbol for lead?

Answer 17

Pb

Question 18

What is the symbol for nitrogen?

Answer 18

N

Question 19

What is the symbol for phosphorus?

Answer 19

P

Question 20

What is the symbol for oxygen?

Answer 20

O

Question 21

What is the symbol for sulphur?

Answer 21

S

Question 22

What is the symbol for chlorine?

Answer 22

Cl

Question 23

What is the symbol for bromine?

Answer 23

Br

Question 24

What is the symbol for iodine?

Answer 24

I

Question 25

Metallic elements are.

Answer 25

Good conductors of electricity Good conductors of heat Shiny solids Usually have high melting and boiling points Usually malleable and ductile All are solids at room temperature (except mercury)

Question 26

Non-metallic elements are

Answer 26

Non-metallic solids tend to be soft and brittle (diamonds are an exception) Poor conductors of heat Can be a gas, solid or liquid at room temperature Usually dull (diamonds are an exception) Poor conductors of electricity (graphite is an exception) Usually have low melting and boiling points

Question 27

What is a compound?

Answer 27

A material that is made up of two or more different elements that are chemically joined together

Question 28

Draw the diagram of a compound.

Answer 28

Check book for answer

Question 29

What is a mixture?

Answer 29

Two or more substances mixed together which are easy to separate

Question 30

Draw the diagram for mixtures.

Answer 30

Check book for answer