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Year 8 Chemistry: Matter

Total questions: 52

Worksheet time: 26mins

Name
Class
Date
1.

The smallest part of an element that can exist

a)

Atom

b)

Element

c)

Compound

d)

Mixture

2.

Substances that all other materials are made up of, and which contain only one type of atom.

a)

Element

b)

Pure substance

c)

Mixture

d)

Compound

3.

What is the chemical symbol for Magnesium?

a)

Mg

b)

Na

c)

Ma

d)

Au

4.

What is the chemical symbol for Gold?

a)

Au

b)

Go

c)

Ag

d)

G

5.

What is the chemical symbol of Hydrogen?

a)

H

b)

Hy

c)

Hg

d)

He

6.

What is the chemical symbol of Lead?

a)

Pb

b)

Le

c)

Ld

d)

L

7.

Zn is the chemical symbol for...

a)

Zinc

b)

Helium

c)

nothing...it isn't a chemical symbol

d)

Xenon

8.

Copper has the chemical symbol

a)

Cu

b)

Cl

c)

C

d)

Ag

9.

Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen?

a)

Hydrogen is an element made of only one kind of atom.

b)

Hydrogen is a compound made of only one kind of atom.

c)

Hydrogen is an element made of two or more kinds of atoms.

d)

Hydrogen is a compound made of two or more kinds of atoms.

10.

Pure substances made up of atoms of two or more elements, chemically joined together.

a)

Compound

b)

Mixture

c)

Element

d)

Molecule

11.

A group of two or more (up to thousands) atoms chemically joined.

a)

Molecule

b)

Element

c)

Compound

d)

Mixture

12.

Two or more pure substances that are not chemically joined but mixed.

a)

Mixture

b)

Compound

c)

Element

d)

Molecule

13.

A formula that shows the elements present in a compound and their relative proportions.

a)

Chemical Formulae

b)

Physical Formulae

14.

The particle diagram contains ____ total molecules and ____ total atoms.

a)

4 molecules, 8 atoms

b)

8 molecules, 4 atoms

c)

4 molecules, 4 atoms

d)

8 molecules, 8 atoms

15.

Which of the following represents an element?

a)

H2

b)

H2O

c)

CaCO3

d)

NaCl

16.

Salt has a chemical formula of NaCl.

Salt is a...

a)

Compound

b)

Element

c)

Mixture

d)

None of the Above

17.

How many elements are represented in the compound?

Na2CO3

a)

3

b)

1

c)

2

d)

4

18.

How many atoms are represented in the chemical formulae?

Na2CO3

a)

6

b)

5

c)

2

d)

3

19.

Classify the picture with the correct label.

a)

Compound

b)

Mixture of Compounds

c)

Mixture of Elements

d)

Element

20.

Classify the picture with the correct label.

a)

Mixture of Elements

b)

Compound

c)

Element

d)

Mixture of Elements and Compounds

21.

Classify the picture with the correct label.

a)

Mixture of Elements & Compounds

b)

Element

c)

Compound

d)

Mixture of Compounds

22.

Classify the picture with the correct label.

a)

Mixture of Compounds

b)

Compounds

c)

Mixture of Elements

d)

Mixture of Elements & Compounds

23.

Classify the picture with the correct label.

a)

Mixture of Compounds

b)

Compound

c)

Element

d)

Mixture of Elements

24.

Classify the picture with the correct label.

a)

Compound

b)

Element

c)

Mixture of Compounds

d)

Mixture of Elements

25.

Which description below is a true statement about the diagram?

a)

The diagram can be classified as an element and a molecule

b)

The diagram can be classified as a compound

c)

The diagram can be classified as a mixture of two compounds

d)

The diagram can be classified as a mixture of two elements

26.

These are found on the Periodic Table.

a)

elements

b)

compounds

c)

mixtures

27.

Water is an element.

a)

False

b)

True

28.

The table shows two sets of substances. Which terms best identify both sets?

a)

Set 1: compounds; Set 2: elements

b)

Set 1: elements; Set 2: compounds

c)

Set 1: elements and compounds; Set 2: elements

d)

Set 1: compounds; Set 2: elements and compounds

29.

What name is given to a very long molecule made from smaller repeating units?

a)

Polymer

b)

Element

c)

Compound

30.

An example of a natural polymer is _____.

a)

Rubber

b)

Dacron

c)

Nylon

31.

How are synthetic polymers made?

a)

chemical reactions

b)

naturally

32.

Why is poly(ethene) used for plastic bags?

a)

It is strong and flexible

b)

It is a good conductor of heat

c)

It is a bad conductor of electricity

33.

Why is disposing of polymers difficult?

a)

They do not biodegrade easily

b)

They are poisonous

c)

They are very heavy

34.

Small molecules that make up larger molecules.

a)

monomer

b)

polymer

c)

plastic

d)

synthetic

35.

What do we call columns on the periodic table?

a)

Groups

b)

Periods

36.

What do we call rows on the Periodic Table?

a)

Periods

b)

Groups

37.

Polymers made of long chain molecules have ....

a)

higher melting points

b)

lower melting points

38.

Which elements have similar physical and chemical properties?

a)

Same group

b)

Same period

39.

Which group of the metals is the most reactive?

a)

Group 1

b)

Group 0

c)

Group 2

d)

Group 7

40.

What are Group 1 elements called?

a)

Alkali metals

b)

Halogens

c)

Noble gases

41.

What are Group 7 elements called?

a)

Halogens

b)

Alkali metals

c)

Noble gases

42.

What are Group 0 elements called?

a)

Noble gases

b)

Alkali metals

c)

Halogens

43.

What elements are found in the shaded region?

a)

Metals

b)

Non-metals

c)

Metalloids

44.

What elements are found in the shaded region?

a)

Non-metals

b)

Metals

c)

Metalloids

45.

Which elements are good conductors of heat and electricity?

a)

Metals

b)

Non-metals

c)

Metalloids

46.

The period for Bromine is ___________.

a)

4

b)

3

c)

2

47.

Beryllium is in ___________.

a)

Group 2

b)

Group 4

c)

Group 3

d)

Group 7

48.

What happens to the reactivity of the alkali metals as you move down the group?

a)

increases

b)

decreases

49.

Which gas is released when the alkali metals react with water?

a)

hydrogen

b)

oxygen

c)

carbon dioxide

50.

Which of these is not a noble gas?

a)

Nitrogen

b)

Argon

c)

Krypton

d)

Helium

51.

Which noble gas is found in signs or light displays?

a)

Neon

b)

Helium

c)

Argon

d)

Krypton

52.

What is the trend in reactivity of Group 7 elements (Halogens) ?

a)

Reactivity decrease down group 7

b)

Reactivity increases down group 7

c)

Reactivity stays the same down group 7

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