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Chemistry for kids

Total questions: 130

Worksheet time: 1hrs 6mins

Name
Class
Date
1.
An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84.  At room temperature this element is a very stable gas.  How many neutrons are in this atom?
a)
36
b)
48
c)
84
2.
How many protons, neutrons, and electrons are present in an atom of Cadmium, Cd, with a mass of 112 amu?
a)
48 protons, 112 neutrons, 64 electrons
b)
48 protons, 160 neutrons, 48 electrons
c)
48 protons, 64 neutrons, 48 electrons
3.
An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84.  At room temperature this element is a very stable gas.  How many neutrons are in this atom?
a)
36
b)
48
c)
84
4.
What type of particles are found in the cloud surrounding the nucleus?
a)
Positively charged particles and negatively charged particles.
b)
Negatively charged particles only.
c)
Neutral particles and positively charged particles.
5.
What is the mass number of potassium (K) atom that has 20 neutrons?
a)
18
b)
20
c)
39
6.
An atom has 25 protons, 30 neutrons, and 25 electons.  What is the charge of the atom's nucleus?
a)
+25
b)
+30
c)
-25
7.
The atoms of a certain element each contain 11 protons and 1 valence electron.  Which statement identifies this element and its chemical reactivity?
a)
The element is sodium, and it is highly reactive.
b)
The element is fluorine, and it is not reactive.
c)
The element is sodium, and it is not very reactive.
8.
A chemist is identifying the elements present in a sample of seawater.  What characteristic of an element's atoms always determines the element's identity?
a)
The number of neutrons.
b)
The number of protons.
c)
The number of valence electrons.
9.
The table below list three characteristics of an atom of an element.
An atom of which element is described by the data in the table?
a)
Radon (Rn)
b)
Cadmium (Cd)
c)
Rubidium (Rb)
10.
A model of an atom is shown on your worksheet.  An atonm of which element is represented by this model?
a)
Boron (B)
b)
Carbon (C)
c)
Sodium (Na)
11.
Study the diagram on your worksheet.  A student is asked to identify an element that is a pale-yellow brittle solid and does not conduct electricity.  At which location would the element most likely be found?
a)
1
b)
3
c)
4
12.
Based on its chemical formula, which of the following substances is an organic compound?
a)
Urea, CH4N2O
b)
Ammonium sulfide, (NH4)22S
c)
Silane, SiH4
13.
Which substance represented in this equation is classified as an element?
a)
CO
b)
H2O
c)
H2
14.
How many atoms are represented in the reactants in the equation on your worksheet?
a)
36
b)
12
c)
24
15.
Coal contains carbon and other elements.  Which of these is the best evidence that a chemical reaction occurs when coal burns?
a)
The shape of the coal changes.
b)
A new substance is produced.
c)
Coal is made up of more than one element.
16.
How many protons, neutrons, and electrons are present in an atom of Cadmium, Cd, with a mass of 112 amu?
a)
48 protons, 112 neutrons, 64 electrons
b)
48 protons, 160 neutrons, 48 electrons
c)
48 protons, 64 neutrons, 48 electrons
17.
 Which two elements are in the same period?
a)
Sn and Rb
b)
F and Cl
c)
K and Ba
18.

WHAT IS THE FORMULAE OF WATER

a)

H₂O

b)

CAO

c)

HO

d)

NONE OF THESE

e)

UNE

19.

WHICH APPARATUS IS THIS

a)

measuring cylinder

b)

beaker

c)

conical flask

d)

round bottom flask

20.

the formulae of glucose is

(a)  

21.

name this famous scientist

a)

joseph preistly

b)

stephen hawking

c)

none of these

d)

thomas edison

22.

magnets are extracted from which of these

a)

magnetite

b)

igenous rocks

c)

petroleum

d)

siderite(iron ore)

23.

What is the mass Number

a)

Its the number of an atom, is its total number of protons and neutrons

b)

Number of the atom's mass

c)

its how many molecules are in your body

24.

Is the Coca Cola a pure subtane

a)

No

b)

Yes

25.

what is the abbreviation of Silver

a)

Ag

b)

Au

c)

Cl

d)

Aug

26.

Which is the most important Element in our Bodies

a)

Oxygen

b)

Phosphorus

c)

Sulfur

d)

Sodium

27.

Is Nitogen an element from our body

a)

Yes

b)

No

28.

Which is the atomic mass of the Oxygen

a)

1.00874u

b)

4.567u

c)

35.453u

d)

15.999u

29.

Is the Gold a pure substance

a)

Yes

b)

No

c)

Maybe

30.

Which is abbrebation of Sodium

a)

Na

b)

Ne

c)

Sl

d)

Sd

31.

Is the Mass number a whole number

a)

Yes

b)

Nel

32.
A chemical change happens when...
a)
a substance is changed at the atomic level 
b)
bonds are broken and formed 
c)
a new substance is made
d)
all of the above! 
33.
A catalyst  
a)
is added to a reaction to make it slow down 
b)
breaks apart and is changed 
c)
provides an energetic short cut to the products 
34.
Chemical Formulas ...
a)
are written in alphabetical order 
b)
represent the destruction or creation of atoms 
c)
represent how atoms are arranged in a chemical reaction 
35.
The compounds or elements present at the end of a reaction 
a)
reactants
b)
catalyst
c)
products
d)
energy 
36.
The compounds and elements that are present at the beginning of a reaction:
a)
reactants
b)
catalyst
c)
products
d)
energy 
37.
Which of the following reactions is a combustion reaction ? 
a)
MgCO3 + O2 → MgO + CO2  
b)
C3H8 + 5O2 → 3CO2 + 4H2O 
c)
6CO2 + 6H2O → C6H12O6 + 6O2 
d)
6CO2 + 6H2O → C6H12O6 + 6O2 
38.
What is the law of Conservation of Mass?
a)
A measure of how much mass is created or destroyed. 
b)
Mass can neither be created nor destroyed during a chemical reaction. 
39.
Explain this graph
a)
A catalyst is used to speed up the reaction rate
b)
The catalyst provides a short cut to the products
c)
The red line shows how the catalyst saves energy 
d)
All of these choices
40.
Which of the following is a decomposition reaction?
a)
MgCo3 --> MgO + CO2 
b)
SO3 + H2O --> H2SO4
c)
2 Mg + O2 --> 2MgO 
41.
What kind of change is a phase change?
a)
Physical - it's still the same substance
b)
chemical - it's made of chemicals 
42.

a)

Physics

b)

Algebra

c)

Maths

d)

Geometry

43.

a)

Arts

b)

Choir

c)

Drama

d)

Dancing

44.



(a)  

45.



(a)  

46.

a)

Maths

b)

Ethics

c)

Civics

d)

Spanish

47.

a)

History

b)

Philosophy

c)

Spanish

d)

Drama

48.



(a)  

49.



(a)  

50.



(a)  

51.



(a)  

52.

a)

Geography

b)

History

c)

Ethics

d)

Philosophy

53.

a)

Literture

b)

Liteture

c)

Literature

d)

Litaratore

54.

a)

Maths

b)

Algebra

c)

Physics

d)

Chemestry

55.

a)

Maths

b)

Algebra

c)

Physics

d)

Chemestry

56.



(a)  

57.

How many atoms of sodium (Na) are in one molecule of baking soda?

a)

1

b)

2

c)

3

d)

4

58.

Ozone and Oxygen molecules are the same substance because they both are made only of oxygen atoms.

a)

true

b)

false

59.

What is the chemical symbol for carbon?

a)

C

b)

Ca

c)

Cn

d)

Crn

60.

Molecules bonded together make up atoms.

a)

true

b)

false

61.

How many atoms make up one molecule of laughing gas?

a)

1

b)

2

c)

3

d)

4

62.

When we combined vinegar and baking soda and created carbon dioxide what was the product?

a)

vinegar

b)

carbon dioxide and baking soda

c)

carbon dioxide

d)

vinegar and baking soda

63.

In a chemical reaction or change a new substance is not created.

a)

true

b)

false

64.

If there is a rise in temperature during a chemical reaction it is called a _________________ reaction.

a)

endothermic

b)

exothermic

65.

Atoms are mostly made up of...

a)

empty space

b)

electrons

c)

solids and liquids

66.

What did the second man drink?

a)

Arsenic

b)

Hydrogen Peroxide

c)

Helium Oxolate

67.

What is Batman's favorite element?

a)

Na

b)

H

c)

O

d)

Cl

68.
What is a product?
a)
The starting substance
b)
The ending substance
69.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the reactant(s).
a)
Hydrogen and Oxygen
b)
water
70.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).
a)
Hydrogen and oxygen
b)
water
71.
Angelina mixes 2 substances together in a beaker. The beaker becomes hot and the liquid changes color.
Did a chemical reaction occur?
a)
yes, because the properties changed and a new substance was made.
b)
no, because the properties did not change.
72.
What is a reactant?
a)
The starting substance
b)
The ending substance
73.
Which of the following are NOT signs that a chemical reaction occured?
a)
the properties changed
b)
bubbles of gas formed
c)
color stays the same
d)
smells different
74.
What is a precipitate?
a)
a change in color 
b)
a change in temperature
c)
a solid formed
d)
a gas formed
75.
Alex wants to mix two substances together and to find out if a chemical reaction happens. What should he do?
a)
test the solubility before and after mixing
b)
measure the volume before and after mixing
c)
measure the mass before and after mixing
d)
test the density of the before substance but not the after substances.
76.
a student mixes  apple juice, water, and cinnamon together. Did a chemical reaction occur?
a)
Yes, because the apple juice changed the color of the water.
b)
yes, because the temperature stayed the sam
c)
no, because the properties stayed the same.
d)
yes, because dissolving is always a chemical reaction.
77.
Burning is always a chemical reaction.
a)
True
b)
false
78.
Sandra was burning a vanilla candle. Was there a chemical reaction?
a)
no, because burning is never a chemical reaction.
b)
Yes, because the properties of the wick changed.
c)
yes, because heat was added.
d)
no, because the ash formed was a different substance.
79.
Which of the following is NOT a chemical reaction?
a)
burning a marshmallow in a campfire.
b)
a campfire
c)
acid rain turning a copper roof green.
d)
Dissolving red Koolaid in water.
80.
Which of the following is a chemical reaction?
a)
Burning bread in the toaster.
b)
melting wax in a microwave.
c)
dissolving salt in water
d)
boiling water to make steam.
81.
A chemical change happens when...
a)
a substance is changed at the atomic level 
b)
bonds are broken and formed 
c)
a new substance is made
d)
all of the above! 
82.
A catalyst  
a)
is added to a reaction to make it slow down 
b)
breaks apart and is changed 
c)
provides an energetic short cut to the products 
83.
Chemical Formulas ...
a)
are written in alphabetical order 
b)
represent the destruction or creation of atoms 
c)
represent how atoms are arranged in a chemical reaction 
84.
The compounds or elements present at the end of a reaction 
a)
reactants
b)
catalyst
c)
products
d)
energy 
85.
The compounds and elements that are present at the beginning of a reaction:
a)
reactants
b)
catalyst
c)
products
d)
energy 
86.
Which of the following reactions is a combustion reaction ? 
a)
MgCO3 + O2 → MgO + CO2  
b)
C3H8 + 5O2 → 3CO2 + 4H2O 
c)
6CO2 + 6H2O → C6H12O6 + 6O2 
d)
6CO2 + 6H2O → C6H12O6 + 6O2 
87.
What is the law of Conservation of Mass?
a)
A measure of how much mass is created or destroyed. 
b)
Mass can neither be created nor destroyed during a chemical reaction. 
88.
Explain this graph
a)
A catalyst is used to speed up the reaction rate
b)
The catalyst provides a short cut to the products
c)
The red line shows how the catalyst saves energy 
d)
All of these choices
89.
Which of the following is a decomposition reaction?
a)
MgCo3 --> MgO + CO2 
b)
SO3 + H2O --> H2SO4
c)
2 Mg + O2 --> 2MgO 
90.
What kind of change is a phase change?
a)
Physical - it's still the same substance
b)
chemical - it's made of chemicals 
91.
A _________ is a substance made of two or more DIFFERENT elements chemically combined. 
a)
mixture
b)
compound
c)
substance 
92.
A mixture can be separated by ________ means. 
a)
physical
b)
chemical
93.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
94.
The characteristics or properties of metals include
a)
shiny and solid
b)
ductile and malleable
c)
lose electrons
d)
all of the above
95.
Which particle contributes the negative charge to the atom?
a)
proton
b)
electron
c)
neutron
d)
nucleus
96.
Water is an element?
a)
true
b)
false
97.
Gold is an example of a(n) 
a)
pure element
b)
pure compound
c)
pure mixture
98.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

99.

True or False? Neutrons have a negative charge

a)

True

b)

False

100.

A pure substance that is a compound is made out of

a)

particles of more than one type of atom

b)

particles of the same type of atom

c)

a mixture of two or more substances that can be physically separated

101.

A molecule is

a)

a singular particle of a particular element

b)

another name for an element

c)

2 or more atoms that are combined

102.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

103.

electrons

a)

no charge, nucleus

b)

positive charge, nucleus

c)

negative charge, shells

d)

negative charge, nucleus

104.

neutrons

a)

no charge, shells

b)

positive charge, nucleus

c)

neutral, no charge, nucleus

d)

negative charge, shells

105.

What does a represent?

a)

Proton

b)

Neutron

c)

Electron

106.

What does b represent?

a)

Proton

b)

Neutron

c)

Electron

107.

What does c represent?

a)

Proton

b)

Neutron

c)

Electron

108.

What is the atomic mass of this element?

a)

20

b)

60

c)

40

d)

41

109.

What is the symbol of this element?

a)

Calcium

b)

P

c)

Ca

d)

C

110.

What is the atomic number of this element?

a)

20

b)

60

c)

40

d)

41

111.
A _________ is a substance made of two or more DIFFERENT elements chemically combined. 
a)
mixture
b)
compound
c)
substance 
112.
A mixture can be separated by ________ means. 
a)
physical
b)
chemical
113.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
114.
The characteristics or properties of metals include
a)
shiny and solid
b)
ductile and malleable
c)
lose electrons
d)
all of the above
115.
Which particle contributes the negative charge to the atom?
a)
proton
b)
electron
c)
neutron
d)
nucleus
116.
Water is an element?
a)
true
b)
false
117.
Gold is an example of a(n) 
a)
pure element
b)
pure compound
c)
pure mixture
118.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

119.

True or False? Neutrons have a negative charge

a)

True

b)

False

120.

A pure substance that is a compound is made out of

a)

particles of more than one type of atom

b)

particles of the same type of atom

c)

a mixture of two or more substances that can be physically separated

121.

A molecule is

a)

a singular particle of a particular element

b)

another name for an element

c)

2 or more atoms that are combined

122.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

123.

electrons

a)

no charge, nucleus

b)

positive charge, nucleus

c)

negative charge, shells

d)

negative charge, nucleus

124.

neutrons

a)

no charge, shells

b)

positive charge, nucleus

c)

neutral, no charge, nucleus

d)

negative charge, shells

125.

What does a represent?

a)

Proton

b)

Neutron

c)

Electron

126.

What does b represent?

a)

Proton

b)

Neutron

c)

Electron

127.

What does c represent?

a)

Proton

b)

Neutron

c)

Electron

128.

What is the atomic mass of this element?

a)

20

b)

60

c)

40

d)

41

129.

What is the symbol of this element?

a)

Calcium

b)

P

c)

Ca

d)

C

130.

What is the atomic number of this element?

a)

20

b)

60

c)

40

d)

41

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