Materials, Elements, Compounds And mixtures

Question 0

Can i name the three states of matter?

Answer 0

Solids, liquids, gases

Question 1

Can i define matter?

Answer 1

Matter is anything which occupies space and which has mass

Question 2

Can i describe an experiment to show that gas has mass?

Answer 2

1) place a deflated balloon on a balance
2) write down the mass of the balloon
3) inflate the balloon by blowing into it and tie a knot
4) write down the new mass of the balloon

Question 3

Can i describe an experiment to show that gas has a volume?

Answer 3

1) place a gas jar and a beehive shell filled with water in a bowk filled with water
2) connect a length of clean rubber and take a deep breath and blow gently into the water
3) watch the bubbles of gas in the water

Question 4

Can i list three proprieties of a solid?

Answer 4

✔️Definite shape
✔️definite volume
✔️do not flow

Question 5

Can i explain the arrangement of particles in a solid?

Answer 5

✔️arranged in a regular way
✔️ cannot move out of position
✔️ particles are packed closely together
✔️strong forces holding the particles together.

Question 6

Can i list three proprieties of a liquid?

Answer 6

✔️No definite shape
✔️definite volume
✔️flow and evaporate

Question 7

Can i explain the arrangement of particles in a liquid?

Answer 7

✔️no regular arrangement
✔️the liquid has no definite shape of its own
✔️can slide
✔️particles are weaker than in a solid

Question 8

Can i explain the particles in a gas

Answer 8

✔️particles are much further apart than in a liquid or a solid
✔️Particles can move quickly into all space available
✔️There are only very weak forces between the particles.

Question 9

Can i distinguish between melting and freezing?

Answer 9

The melting point is a high temperature at which a solid changes to a liquid. The freezing point is a low temperature at which a liquid changes to a solid.

Question 10

Can i distinguish between boiling and condensing?

Answer 10

Boiling is changing a liquid to a gas. Condensing is changing a gas to a liquid.

Question 11

Can i define and explain evaporation?

Answer 11

Evaporation is the changing of an liquid to a gas

Question 12

Do I know the boiling point of water?

Answer 12

100*C

Question 13

Do i know the boiling point of alcohol?

Answer 13

78.37*C

Question 14

Can i define Element?

Answer 14

An element is a substance that cannot be split up into simpler substances by chemical means

Question 15

Can i define compound?

Answer 15

A compound is a substance that is made up of two or more elements combined together chemically

Question 16

Can i define molecule?

Answer 16

A group of atoms bonded together representing the smallest fundamental unit of a chemical compound that can tale part in a chemical reaction

Question 17

Can i define mixture?

Answer 17

A mixture consists of two or more different substances mingled with each other but not chemically combined

Question 18

Can i give four differences between a compound and a mixture?

Answer 18

1) the amounts of the substances can vary in the mixture but not in the compound
2) a mixture contains two or more substances, a compound is a sing,e substance
3) there are practically no energy changes when a mixture is made, heat is usually taken out or given in when a compound is formed
4) mixtures can be separated back into single elements but compounds cant

Question 19

Can i describe an experiment to compare a mixture of iron and sulfur and iron sulfide?

Answer 19

1) mix together iron filings and some sulfur to make a compound
2) using a magnet separate out the iron filings and the sulfur again ( the iron filings will stick to the magnet)
3) now mix the substances together again
4) heat the substance to make a compound using a bunsen burner and a test tube
5) a compound has been made compared to the mixture
6) note how using a magnet you can no longer separate out the iron filings

Question 20

Can i list the first twenty elements?

Answer 20

1) hydrogen
2) helium
3) lithium
4) beryllium

5) boron
6) carbon
7) nitrogen
8) oxygen

9) florine
10) neon
11) sodium
12) magnesium

13) aluminium
14) silicon
15) phosphorus
16) sulfur

17) chlorine
18) argon
19) potassium
20) clacium

Question 21

What is the symbol for the element hydrogen?

Answer 21

H

Question 22

What is the symbol for the element helium?

Answer 22

He

Question 23

What is the symbol for the element Lithium?

Answer 23

Li

Question 24

What is the symbol for the element Beryllium?

Answer 24

Be

Question 25

What is the symbol for Boron?

Answer 25

B

Question 26

What is the symbol for Carbon?

Answer 26

C

Question 27

What is the symbol for Nitrogen?

Answer 27

N

Question 28

What is the symbol for Oxygen?

Answer 28

O

Question 29

What is the symbol for Florine?

Answer 29

F

Question 30

What is the symbol for Neon?

Answer 30

Ne

Question 31

What is the symbol for Sodium?

Answer 31

Na

Question 32

What is the symbol for Magnesium?

Answer 32

Mg

Question 33

What is the symbol for Aluminium?

Answer 33

Al

Question 34

What is the symbol for Silicon?

Answer 34

Si

Question 35

What is the symbol for phosphorus?

Answer 35

P

Question 36

What is the symbol for Sulfur?

Answer 36

S

Question 37

What is the symbol for Chlorine?

Answer 37

Cl

Question 38

What is the symbol for Argon?

Answer 38

Ar

Question 39

What is the symbol for Potassium?

Answer 39

K

Question 40

What is the symbol for Calcium?

Answer 40

Ca