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Chemistry Review Honors

Total questions: 74

Worksheet time: 1hrs 16mins

Name
Class
Date
1.
What is the atomic number of Oxygen?
a)
6
b)
7
c)
8
d)
9
2.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

3.

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

a)

element

b)

subatomic particle

c)

electron

d)

matter

4.

the positively charged subatomic particle contained in the nucleus of an atom

a)

proton

b)

neutron

c)

electron

d)

matter

5.

a negatively charged subatomic particle that orbits the nucleus of an atom

a)

proton

b)

neutron

c)

electron

d)

matter

6.

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

a)

proton

b)

neutron

c)

electron

d)

matter

7.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

8.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

9.

one of several forms of a single element, which contains the same number of protons, but different numbers of neutrons

a)

isotope

b)

ion

c)

orbital

d)

nucleus

10.

an atom or group of atoms that has gained or lost one or more electrons and is now either positively or negatively charged

a)

isotope

b)

ion

c)

orbital

d)

nucleus

11.
What does this image represent?
a)
Atom
b)
Element
c)
Molecule
d)
Marshmallows
12.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
13.
2H2O
How many Oxygen atoms are present?
a)
2
b)
4
c)
1
d)
5
14.
2H2O
How many H2O molecules are present?
a)
1
b)
4
c)
2
d)
8
15.
When there is no subscript after an element's symbol, it means there are how many atoms of that element?
a)
0
b)
1
c)
2
d)
unknown
16.
Bonds between atoms in a molecule form as a result of the sharing  of?
a)
formulas
b)
electrons
c)
atoms
d)
chemicals
17.
H2O2← ?
This number tells the number of atoms present.
a)
coefficient
b)
molecule
c)
subscript
d)
atom
18.

What is a positive ion called?

a)

anion

b)

cation

c)

isotope

d)

covalent

19.

What is a negative ion called?

a)

anion

b)

cation

c)

covalent

d)

isotope

20.

If an atom loses electrons, the charge will be positive.

a)

true

b)

false

21.

A Bromine ion gains 1 electron, which of the following is the correct symbol for a Bromine ion?

a)

Br-1

b)

Br+1

c)

Br+7

d)

Br-7

22.
Where are the nonmetals located on the periodic table? 
a)
Blue
b)
Red
c)
Green
23.

How many protons does this isotope of titanium have?

a)

22

b)

26

c)

48

d)

70

24.

How many neutrons are in an atom of carbon-14?

a)

6

b)

8

c)

10

d)

14

25.

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

a)

2

b)

34

c)

36

d)

40

26.
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.
a)
204
b)
206
c)
207
d)
208
27.
Found in the nucleus of the atom
a)
electrons only
b)
protons only
c)
neutrons and protons
d)
neutrons and electrons
28.
Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses. 
a)
protons, neutrons
b)
protons, electrons
c)
neutrons, protons
d)
electrons, protons
29.

The law of _____ states that mass is neither created nor destroyed during chemical reactions or physical changes.

a)

multiple proportions

b)

definite proportions

c)

universal gravitation

d)

conservation of mass

30.

How many different types of molecules are pictured?

a)

2

b)

3

c)

4

d)

8

31.

What type of substance is pictured?

a)

element

b)

compound

c)

mixture

d)

solution

32.

Matter is anything that has...

a)

weight and volume

b)

mass and density

c)

mass and weight

d)

mass and volume

33.

What is this?

lithium (Li)

a)

element

b)

compound

c)

mixture

34.

What is the left part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical equation

35.

What is the right part of a chemical equation called?

2H2 + O2 ---> 2H2O

a)

Reactants

b)

Yields

c)

Products

d)

Chemical Equation

36.

What is the total number of atoms present in 5Na3PO4?

a)

5

b)

55

c)

40

d)

8

37.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

YES

b)

NO

38.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number in front of a chemical formula.
c)
The number in between the chemical symbols.
d)
The number behind a chemical formula.
39.
Is the following reaction balanced?
2CH3OH + 3O2 --> 2CO2 + 4H2O
a)
yes
b)
no
40.

Balance the following equation:

___ SeCl6+ ___ O2→___ SeO2+____Cl2

a)

1, 1, 1, 3

b)

2, 1, 2, 1

c)

1, 2, 1, 2

d)

2, 2, 2, 4

41.

Balance the following equation:

___ Mg+ ___ O2→___ MgO

a)

1, 1, 3

b)

2, 1, 2

c)

1, 2, 1

d)

2, 2, 2

42.

Balance the following equation:

___ H2+ ___ O2→___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

43.
Which of the following equations are correctly balanced?
a)
12CO2 +H2O --> C6H12O6 + O2
b)
CO2 + 9H2O --> C6H12O6 + O2
c)
CO2 + H2O --> 3C6H12O6 + O2
d)
6CO2 + 6H2O --> C6H12O6 + 6O2
44.
True or false: Some physical changes involve chemical reactions.
a)
True
b)
False
45.
True or false: A physical change can result in an entirely different substance.
a)
True
b)
False
46.
Physical changes can be brought about by
a)
Cutting
b)
Bending
c)
Dissolving
d)
All of the following are correct.
47.
All of the following processes cause physical changes in matter except
a)
Burning
b)
Melting
c)
Freezing
d)
Boiling
48.

What are the most common Elements found on Earth?

a)

O, H, Mg, Si

b)

O, C, H, N

c)

H, C, H20 and SALT

d)

H20, S, N

49.
Which of the following chemical formulas represents a compound? 
a)
C3
b)
O2
c)
CH3CHO
d)
H2
50.
When two or more elements chemically combine
a)
element
b)
compound
c)
mixture
d)
solution
51.
Which statement best describes an element?
a)
made from mixture 
b)
thousands in the world
c)
pure, made of only one atom
d)
can be separated 
52.
Is the following an element or compound?
a)
element
b)
compound
53.

99.9% of the atom's mass is located in the

a)

electrons

b)

nucleus

c)

protons

d)

neutrons

54.

What is the difference between butane and isobutane?

a)

They have different chemical formulas

b)

They have different atomic masses

c)

They have different chemical structures

d)

They have different elements in them

55.

Given the formula representing a compound:


Which formula represents an isomer of this compound?

a)
b)
c)
d)
56.

What is the molecular formula for structure showed?

a)

C8H18

b)

C3H3

c)

C8H3

d)

C3H2(CH3)3

57.

Put the subscripts into the correct position for the formula of this compound

C​ (a)   H​ (b)   O​ (c)  

Choose from the below words
4
8
2
14
1
7
6
58.
What is the best formula for these molecules?
(on the model: WHITE is Hydrogen and RED is Oxygen)
a)
H2O
b)
H2O2
c)
3H2O
d)
4H2O
59.

Each element is defined by the number of

a)

Atoms

b)

Isotopes

c)

Neutrons

d)

Protons

e)

Nuclei.

60.
What is the best formula for this molecule?
a)
C3H4O3
b)
C3H4O
c)
C3H4O2
d)
C3H4O4
61.

Students mix 25 grams of baking soda with 15 grams of vinegar to observe the chemical reaction that takes place. How many grams of products would be expected?

a)

15 grams

b)

25 grams

c)

40 grams

d)

50 grams

62.

Identify whether the following reaction correctly represents the Law of Conservation: SnO₂ + 2H₂ → Sn + 2H₂O

a)

Yes

b)

No

63.
In order for an atom to be neutral what has to be true?
a)
The atom has more protons than neutrons
b)
The atom has more neutrons than protons
c)
The atom has the same number of protons and neutrons
d)
The atom has the same number of protons and electrons
64.

A process in which atoms rearrange to form new substances.

a)

extended structure

b)

boiling point

c)

chemical reaction

65.

In a chemical equation the products are on the right side of the arrow. Are the products the beginning substances or the ending substances?

a)

beginning

b)

ending

66.

In order for an equation to be balanced, there must be ...

a)

an equal amount of atoms on both sides

b)

a greater mass on the product side

c)

a greater mass on the reactant side

d)

elements with the same atomic # on both sides

67.
Which of the following models best demonstrates a balanced chemical equation?
a)
F
b)
G
c)
H
d)
J
68.
What types of reactions absorb and release heat?
a)
acidic and basic
b)
endothermic and exothermic
c)
endothermic and heat transfusion
d)
covalent and ionic
69.

How many of each element are in 3Al2(SO4)3

a)

6Al, 9S, 36O

b)

3Al2, 3S, 12O

c)

18Al, 9S, 12O

d)

6Al, 12SO

70.

What is D?

a)

Electron

b)

Proton

c)

Neutron

d)

Nucleus

71.

How many bonds will a C atom form?

a)

1

b)

2

c)

3

d)

4

72.

CHCl3 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

73.
Some elements combine chemically and no longer have the same ________________ they did before forming a compound.
a)
valence electons
b)
energy
c)
properties
d)
group number
74.
A ____________is the force that holds atoms together in a compound.
a)
Chemical Formula
b)
Chemical Reaction
c)
Chemical Bond
d)
Synthesis Reaction

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