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Elements of compounds

Total questions: 76

Worksheet time: 51mins

Name
Class
Date
1.

what is an atom

a)

smallest part of the universe

b)

smallest part of a substance

c)

smallest part of anything

d)

smallest part of water

2.

same number of protons, different number of neutrons

a)

atomic number

b)

mass number

c)

isotope

d)

ion

3.
Water is an element?
a)
true
b)
false
4.
Milk turning sour
a)
Chemical Change
b)
Physical Change 
5.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
6.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
7.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
8.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
9.
Particles in an atom that are neutral and have no charge are 
a)
negatrons 
b)
electrons 
c)
neutrons 
d)
protons 
10.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
d)
useful to human beings.
11.
How many protons does this atom have?
a)
2.5
b)
6
c)
5
d)
10.811
12.
If the number of protons equal the number of _____, the atom will have no charge
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
13.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
14.
A combination of substances that are not chemically combined is called a(n)____________. 
a)
mixture
b)
compound
c)
physical
15.
An element is made up of only one kind of _____.
a)
isotope
b)
plastic
c)
atom
d)
metal
16.
What are the 3 subatomic particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
17.

Chemistry is a branch of science to study

(I) Interactions between matter

(II) Structure of matter

(III) Composition of matter

(IV) Properties of matter

a)

I, II, and III

b)

I, II, and IV

c)

II, III, and IV

d)

I, II, III, and IV

18.

Which one is not a Chemistry career?

a)

Lecturer

b)

Farmer

c)

Actuary

d)

Anesthetist

19.

These chemicals are used in food processing except..

a)

Sodium chloride

b)

Sodium carbonate

c)

Carbon dioxide

d)

Sodium bicarbonate

20.

An experiment is carried out to study the solubility of sodium chloride in water and in benzene. What is the

(i) manipulated variable and

(ii) constant variable

of the experiment?

a)

(i) Solvent and (ii) rate of stirring

b)

(i) Solvent and (ii) mass of sodium chloride

c)

(i) Solute and (ii) volume of solvent

d)

(i) Solute and (ii) rate of stirring

21.

When heating solution in a boiling tube, what precaution must you take?

a)

Never heat the solution too strongly

b)

Never hold the boiling tube vertically

c)

Never use a Pyrex boiling tube to heat the solution

d)

Never direct the mouth of the boiling tube at your classmates

22.

An experiment should be carried out in the fume cupboard if it involves

a)

the release of poisonous gas.

b)

the release of flammable gas.

c)

the use of corrosive chemicals.

d)

the use of oxidising chemicals.

23.

Why is it important to understand the experimental procedures before carrying out the experiment?

a)

To prevent wastage of chemicals

b)

To prevent accidents from happening

c)

To prevent repetition of the experiment

d)

To know what apparatus is needed to carry out the experiments

24.

What are the benefits for our country from producing chemicals locally?

a)

The government can collect tax from chemical export

b)

The people can build residential places nearby

c)

The industry provide job opportunities

d)

The country save on foreign exchange

25.

(a)   is the compound of hydrogen and carbon only.

26.

Coal,oil and natural gas are examples of (a)  

27.

A device that can convert sunlight directly to electricity is (a)  

28.

Resources that do not run out are called (a)  

29.

This process is used in nuclear power plants

a)

Fission

b)

Fusion

30.

This process is how the sun produces energy

a)

Fusion

b)

Fission

31.

____________ is the branch of chemistry that would identify enzymes and determine reaction mechanisms for biochemical reactions.

a)

Organic Chemistry

b)

Biochemistry

c)

Physical Chemistry

d)

Analytical Chemistry

32.

____________ is the branch of chemistry that would measure the amount of energy released or absorbed in chemical processes.

a)

Inorganic Chemistry

b)

Organic Chemistry

c)

Biochemistry

d)

Physical Chemistry

33.

____________ is the branch of chemistry that would study and develop new materials to improve existing products or make new ones that in general do no contain carbon.

a)

Organic Chemistry

b)

Inorganic Chemistry

c)

Biochemistry

d)

Physical Chemistry

34.
The study of chemicals that, in general, do not contain carbon. 
a)
applied chemistry
b)
inorganic chemistry
c)
organic chemistry
d)
biochemistry
35.

Identifies an unknown through by determining its composition.

a)

analytical

b)

physical

c)

organic

d)

biochemistry

36.

finding out how much nitrogen is in a sample of air

a)

organic

b)

inorganic

c)

analytical

d)

physical

37.
Something that takes up space and has mass.
a)
volume
b)
matter
c)
mass
d)
density
38.
The amount of space something takes up
a)
density
b)
volume
c)
mass
d)
matter
39.

Which among the following is a NOT MATTER?

a)

Mars

b)

Smoke

c)

Steam

d)

none of the choices

40.
The Periodic Table is arranged by _______ ____________.
a)
 Atomic Mass
b)
 Atomic Number
c)
  Atomic Volume
d)
  Atomic Symbol
41.
 ____________________ are a substances formed from 2 or more different elements chemically combined.
a)
     Electrons
b)
   Atoms
c)
   Mixtures
d)
 Compounds
42.
_______________ are combinations of 2 or more atoms.
a)
Molecules 
b)
 Mixtures
c)
Solutions 
d)
Elements
43.
Which of the following is an example of a physical change?
a)
Metal Rusting 
b)
Toast Burning
c)
Ice Melting
d)
All are examples
44.
Which of the following provide evidence to support a chemical change?
a)
 Gas Production
b)
Color Change
c)
 Temperature Change
d)
 All are provide evidence  
45.
Which of the following is an example of a chemical change?
a)
 Toast Burning 
b)
Ice Melting
c)
 Cutting Wood
d)
All are examples
46.
 What type of energy is the energy of motion?
a)
Thermal
b)
Kinetic 
c)
Nuclear
d)
Chemical
47.
 What type of energy is the energy of motion?
a)
Thermal
b)
Kinetic 
c)
Nuclear
d)
Chemical
48.
Which of the following is an example of a mixture?
a)
Trail Mix
b)
Baking Soda and Vinegar 
49.
 A ______________ has a definite volume and a definite shape.
a)
Solid
b)
Liquid
c)
Gas
50.
 A _____________can change volume very easily. Its particles move at high speeds in all directions. 
a)
Solid
b)
Liquid
c)
Gas
51.
 A _________________ has no shape of its own, but has a definite volume. 
a)
Solid
b)
Liquid
c)
Gas
52.
The total energy of a substance’s particles due to their movement or vibration is called…
a)
 Chemical Energy
b)
 Kinetic Energy
c)
Thermal Energy
d)
Nuclear Energy
53.
Atoms are the largest particles of an element.
a)
True
b)
False
54.
Anything that has mass and takes up space
a)
Element
b)
Pressure
c)
Matter
d)
Atom
55.
 Molecules are pure substances that cannot be broken down into any other substance. 
a)
True
b)
False
56.
The force pushing on a surface divided by the area of that surface. 
a)
Proton
b)
Pressure
c)
Electron
d)
Particles
57.
Something that is found in nature and can be used by people. 
a)
Synthetic Materials
b)
Fossil Fuels
c)
Nuclear Fuel
d)
Natural Resources 
58.
Not of natural origin; prepared or made artificially.
a)
Natural Resource 
b)
Matter
c)
Synthetic Material 
d)
Nuclear Power
59.
 You add or remove _________________________ to change the element. 
a)
Electrons
b)
Neutrons
c)
Atoms
d)
Protons
60.
 The faster the particles move the more _________________________is generated. 
a)
Cold
b)
Heat
c)
sound
d)
vibration
61.

How may type of chemical reaction

a)

four

b)

three

c)

two

d)

five

62.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

63.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
64.
Is glass breaking a chemical or phyiscal change?
a)
chemical
b)
physical
65.
Is a a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
66.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
67.
Is melting ice a chemical or physical change?
a)
chemical
b)
physical
68.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
69.
Is mixing lemonade powder with water a physical or chemical change?
a)
physical
b)
chemical
70.
Is mowing the lawn a phyiscal or chemical change?
a)
physical
b)
chemical
71.
Is corroding metal a chemical or physical change?
a)
physical
b)
chemical
72.
Is bleaching your hair a physical or chemical change?
a)
physical
b)
chemical
73.
Element or compound?
H2O
a)
element
b)
compound
74.
Element or compound?
O2
a)
Element
b)
Compound
75.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
76.
Substance dissolved in a solution
a)
concentration
b)
solute
c)
solvent
d)
solution

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