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YEAR8-CHEMISTRY-REVISION TERM3 EXAM

Total questions: 60

Worksheet time: 55mins

Name
Class
Date
1.

The chemical bond that forms when electrons are transferred is called:

a)

Ionic

b)

hydrogen

c)

covalent

2.

When an atom gains an electron it becomes

a)

negatively charged

b)

positively charged

c)

neurtal

3.

Ionic bonds happen when valence electrons are

a)

shared

b)

too heavy

c)

transferred

4.

Valence electrons are

a)

neutral (no charge)

b)

found in the outer most energy level of the atom

c)

equal to the number of protons

5.

How many valence electrons does Oxygen have?

a)

0

b)

16

c)

6

d)

8

6.

What type of bond forms CaF2

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

all answers are correct

7.

Which type of bond is creates MgFe?

a)

covalent bond

b)

ionic bond

c)

metallic bond

d)

all the bonds

8.

What is the charge of an aluminum ion that has 13 protons and 10 electrons?

a)

3+

b)

3 -

c)

no charge

9.

In order for a chemical reaction to occur,

a)

there must be an explosion or fire

b)

bubbling or gas must be produced

c)

a new substance must be formed

d)

the substance must turn color

10.

There are (a)   Oxygen atoms in this chemical formula: H2SO4

11.

What is the chemical name of SO2

a)

monosulfur dioxide

b)

disulfur monoxide

c)

sulfur dioxide

d)

disulfur oxide

12.

What is the chemical name of the ionic compound formed from the attraction between K+1 and S2- ions?

a)

Potassium Sulfide

b)

Potassium disulfide

c)

dipotassium monosulfide

d)

dipotassium sulfide

13.

Elements in Group 6 tend to form

a)

1+ ions

b)

2- ions

c)

8- ions

d)

6- ions

14.

Atoms need to be bonded in order to attain the stability needed like that of _______.

a)

alkali metals

b)

alkaline earth metals

c)

noble gases

d)

semi metals

15.
Which of the following has a full valence (outer) shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
16.
An ionic bond forms when atoms ___________ electrons.
a)
gain
b)
share
c)
increase
d)
transfer
17.
CO2
a)
Ionic
b)
covalent
c)
polyatomic
18.
If an atom gains one electron what charge will it have?
a)
-2
b)
-1
c)
+1
19.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
20.

In the periodic table, the number of valence electrons in each element ___________ from left to right across each period.

a)

Increases

b)

Decreases

c)

Stays the same

21.

Within each _________ in the periodic table, elements have similar properties because they have the same number of valence electrons.

a)

Color

b)

Period (Row)

c)

Neighborhood

d)

Group (Column)

22.

The columns in the periodic table are called ____________.

a)

Periods

b)

Noble Gases

c)

Groups

d)

Stable

23.
The core of an atom where most of the mass of an atom exists; contains protons and neutrons
a)
nucleus
b)
electron shell
c)
proton
d)
electron
24.
What does the prefix "di" mean
a)
1
b)
2
c)
3
d)
4
25.
Covalent bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
26.
What usually forms a negative ion?
a)
Non-metals
b)
metals
27.
What usually forms a positive ion?
a)
Non-metals
b)
metals
28.
The chemical formula of potassium iodide is
a)
KI
b)
PI
c)
KI₂
d)
K₂I
29.
An ionic compound made of copper (Cu2+) and oxygen would be named
a)
copper oxygen.
b)
copper oxide.
c)
dicopper oxide.
d)
copper(II) oxide.
30.
What is the formula for aluminum fluoride?
a)
AlF
b)
Al2F3
c)
AlF3
d)
Al3F2
31.
What is the formula for silicon dioxide?
a)
SO2
b)
NaO2
c)
SiO2
d)
SiO
32.

Which type of bond is formed between a metal and a non-metal?

a)

covalent bond

b)

hydrogen bond

c)

polar bond

d)

ionic bond

33.

What is the charge of a chloride ion that has 17 protons and 18 electrons?

a)

1-

b)

1+

c)

2-

d)

2+

34.

What is the name of the compound with the formula H2SO4?

a)

Hydrochloric Acid

b)

Sulfuric Acid

c)

Nitric Acid

d)

Acetic Acid

35.
Choose the particle that has no charge.
a)
nucleus
b)
neutron
c)
proton
d)
electron
36.
An electron has a _____ charge.
a)
negative
b)
positive
c)
neutral
37.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
38.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
39.

what is the electron arrangement of atom N?

a)

2.

b)

2.8

c)

2.5

d)

2.8.8

40.
Two or more substances that are mixed together but not chemically combined is a ___
a)
compound
b)
mixture
c)
keratin
d)
chromatography
41.

Ink can be separated by a method of -----------------------------------------------

a)

distillation

b)

filtration

c)

chromatography

d)

sedimentation

42.
The mobile phase in paper chromatography is typically a
a)
plasma
b)
solid
c)
gas
d)
liquid
43.
The retention factor is used
a)
to zero the chromatography scale
b)
to identify unknown compounds in a sample
c)
to retain solvent
d)
as a starting tool for chromatography
44.

A substance is soluble if it can be dissolved.


In paper chromatography, the most soluble solute _____________________ .

a)

does not move from the start point

b)

stays closest to the start point

c)

travels furthest away from the start point

d)

can be found in the middle of the chromatogram

45.

What will happen to the movement of particles when heat is applied ?

a)

Move faster

b)

Move slower

46.

Nurul spray a perfume on her hand. The smell of the perfume can be detected also by her friend that stood beside her. What is the process involve ?

a)

Photosynthesis

b)

respiration

c)

Diffusion

47.

Name the process when solid turn to liquid

a)

boiling

b)

Melting

c)

freezing

d)

condensation

48.

Which of the following is the process that involve the absorbing of heat

a)

Boiling

b)

freezing

c)

condensation

49.
What term describes a solid changing to a gas?
a)
Deposition
b)
Sublimation
c)
Evaporation
d)
Freezing
50.

Where are metals located on the periodic table?

a)

Right side of periodic table

b)

Left side of periodic table

c)

zig-zag line of periodic table

d)

none of the above

51.

Chose all properties of metal:

a)

Brittle

b)

Shiny

c)

Malleable

d)

Good Conductors

e)

Ductile

52.

Chose all properties of

non-metal:

a)

Brittle

b)

Dull

c)

Malleable

d)

Good Conductors

e)

Insulator

53.

Which of these elements are a Non-Metal?

a)

Copper

b)

Gold

c)

Oxygen

54.

Some metals are d (a)   , which means they can be drawn into a wire.

55.
What element primarily makes a diamond?
a)
Hydrogen
b)
Silver
c)
Carbon
d)
Calcium
56.

How do ionic bonds form?

a)

Electron pairs are shared between atoms.

b)

Metal atoms lose electrons, which are gained by non-metal atoms.

c)

Protons are exchanged.

d)

Metal atoms lose their outer shell electrons.

57.

A covalent bond is:

a)

A shared electron.

b)

A shared pair of electrons.

c)

The strong electrostatic force of attraction between oppositely charged ions.

d)

The strong electrostatic forces of attraction between positive metal ions and delocalised electrons.

58.

Malleability is a property of metals which means they can be:

a)

Pulled into wires

b)

Bent/hammered into shape

c)

Good conductors of electricity

d)

Good conductors of heat

59.

Graphite is slippery because:

a)

Layers can slide over one another

b)

Weak intermolecular forces of attraction exist between the layers

c)

Covalent bonds are weak

d)

Atoms are different sizes

60.

What do metals conduct well?

a)

heat

b)

electricity

c)

circulation

d)

music

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