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📚EA7: HW28 (12.5)

Total questions: 85

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

!What is sugar (C6H12O6)?

a)
element
b)
compound
c)
mixture
2.

!What is gold (Au)?

a)
element
b)
compound
c)
mixture
3.

**What are valence electrons?

a)

The total number of electrons in an atom

b)

The number of electrons in the outermost shell

c)

The number of electrons in the second shell

d)

The number of protons in the outermost shell

4.

**How many valence electrons does Phosphorus have?

a)

31

b)

5

c)

15

d)

4

5.

**Rows on the period table are called _____ while columns are called _____.

a)
groups, families
b)
groups, periods
c)
periods, groups
d)
families, groups
6.

**How many valence electrons does Silicon Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

7.

**Two Reactants and One Product

a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
8.

**One reactant into several products.

a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
9.

**Identify the reaction type:

C2H6 + O2 --> CO2 + H2O

a)

Double displacement

b)

Synthesis

c)

Acid base

d)

Combustion

10.

**Identify the reaction type for the following equation:

K + F2 --> KF

a)

Double displacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

11.

**Identify the type of reaction:

ZnCl2 + Mg --> Zn + MgCl2

a)

Precipitate

b)

Single Replacement

c)

Double Displacement

d)

Decomposition

12.

**Identify the reaction type:

NaCl + KOH --> KCl + NaOH

a)

Double displacement

b)

Combustion

c)

Redox

d)

Precipitate

13.

!!How many atoms are there TOTAL in: H2SO4

a)
6
b)
5
c)
7
d)
3
14.

!!How many O in Al2(SO4)3

a)

4

b)

7

c)

12

d)

24

15.

!!What is the total number of atoms in 3(NH4)2CrO4

a)

45

b)

35

c)

30

d)

34

16.

!Which statement is true about compounds?

a)

a pure substance where two or more elements are chemically combined

b)

a homogenous mixture of 2 or more elements

c)

a pure substance containing only one type of atom

d)

a heterogeneous mixture of 2 or more elements chemically combined

17.

!What does this illustrate

a)

Elements

b)

Compunds

c)

Mixture of Elements and Compunds

d)

Mixture of Compounds

18.

**AB + CD = AD + CB

a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
19.

~A _________________ mixture is one where the substances are evenly spread throughout.

a)

heterogeneous

b)

homogeneous

c)

pure substance

20.

~Coffee, mouthwash, and vinegar are examples of __________________ mixtures.

a)

heterogeneous

b)

homogeneous

c)

pure

21.

~Air is:

a)

An element

b)

A compound

c)

A mixture

d)

None of these

22.

~A mixture that is uniform and well mixed is _____.

a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
compoud
23.

~Pure substances include:

a)

Elements

b)

Homogeneous Mixtures

c)

Compounds

d)

Heterogeneous Mixtures

24.

~Vinegar

a)

Homogeneous mixture

b)

Heterogeneous mixture

25.

!Which of the following is a chemical symbol?

a)

H2O

b)

O

c)

NaCl

d)

FeO

26.

Balanced or NOT: 4HOCl + C ---> 2H2O + CO2 + 2Cl2

a)

Balanced

b)

NOT

27.

!!Balanced or NOT: Al + O2 ---> 2Al2O3

a)

Balanced

b)

NOT

28.

!!Balanced or NOT: AlCl3 + 3H2O ---> Al(OH)3 + 3HCl

a)

Balanced

b)

NOT

29.

The positive particles of an atom are

a)

electrons

b)

positrons

c)

neutrons

d)

protons

30.

The central region of an atom where its neutrons and protons are is its

a)

nucleus

b)

electron cloud

c)

core

d)

center

31.

An atom with atomic number 6 would have how many protons

a)

6

b)

12

c)

3

d)

cannot be determined

32.

Particles in an atom that are neutral and have no charge are

a)

negatrons

b)

electrons

c)

neutrons

d)

protons

33.

True or False: Neutrons have a negative charge

a)

True

b)

False

34.

What is the atomic number for an element with 3 protons?

a)

2

b)

1

c)

3

d)

6

35.

A particle that moves around the nucleus is a(n)...

a)

Proton

b)

Neutron

c)

Electron

d)

Quark

36.

In the modern periodic table, elements are arranged by:

a)

atomic mass

b)

atomic number

c)

valence electrons

d)

number of isotopes

37.

What does the 1.00794 stand for?

a)

Hydrogen

b)

atomic number

c)

atomic mass

d)

atomic explosion

38.

What subatomic particles would you find in the nucleus of an atom?

a)

Protons only

b)

Protons and Neutrons

c)

Neutrons and Electrons

d)

Protons and Electrons

39.

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

a)

10

b)

20

c)

30

40.

What subatomic particle(s) would be found orbiting the nucleus?

a)

Neutrons only

b)

Electrons only

c)

Protons and Neutrons

d)

Protons and Electrons

41.

Protons and electrons balance the charge of an atom.

a)

True

b)

False

42.

True/False: Compounds are made of two or more different elements.

a)

True

b)

False

43.

What particle uniquely identifies an element?

a)

Number of Valence Electrons

b)

Number of Protons

c)

Number of Electrons

d)

Atomic Mass

44.

Most of the mass in an atom is concentrated in the...

a)

electrons

b)

nucleus

c)

protons

d)

empty space

45.

Electrons are___________

a)

Extremely small even in comparison to protons.

b)

part of the nuclues.

c)

Super Positive, like cheerleaders!

d)

very large

46.

Anything that has mass and takes up space is called

a)

heterogeneous

b)

homogeneous

c)

matter

d)

density

47.

An atoms overall charge is

a)

positive

b)

depends on its mood

c)

neutral

d)

negative

48.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
49.
an element will always have the same number of 
a)
neutrons
b)
protons
c)
isotopes
d)
atoms
50.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
51.
If an atom of oxygen has a charge of -2, how many electrons does the atom have?
a)
18
b)
6
c)
8
d)
10
52.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
53.
If an atom of nickel has a charge of +3, how many electrons does the atom have?
a)
28
b)
25
c)
26
d)
31
54.
What charge does an atom have if it LOSES an electron? 
a)
Positive (+)
b)
Negative (-)
55.
the number of neutron and protons in this atom are(round off the at. mass)
a)
31, 39
b)
32, 36
c)
31,40
d)
31,36
56.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
57.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
58.
How many electrons does Oxygen have as a Neutral atom?
a)
8
b)
6
c)
2
d)
10
59.

The positive particles of an atom are

a)

electrons

b)

positrons

c)

neutrons

d)

protons

60.

The central region of an atom where its neutrons and protons are is its

a)

nucleus

b)

electron cloud

c)

core

d)

center

61.

An atom with atomic number 6 would have how many protons

a)

6

b)

12

c)

3

d)

cannot be determined

62.

Particles in an atom that are neutral and have no charge are

a)

negatrons

b)

electrons

c)

neutrons

d)

protons

63.

What is the atomic number for an element with 3 protons?

a)

2

b)

1

c)

3

d)

6

64.

A particle that moves around the nucleus is a(n)...

a)

Proton

b)

Neutron

c)

Electron

d)

Quark

65.

In the modern periodic table, elements are arranged by:

a)

atomic mass

b)

atomic number

c)

valence electrons

d)

number of isotopes

66.

What subatomic particles would you find in the nucleus of an atom?

a)

Protons only

b)

Protons and Neutrons

c)

Neutrons and Electrons

d)

Protons and Electrons

67.

What subatomic particle(s) would be found orbiting the nucleus?

a)

Neutrons only

b)

Electrons only

c)

Protons and Neutrons

d)

Protons and Electrons

68.

What particle uniquely identifies an element?

a)

Number of Valence Electrons

b)

Number of Protons

c)

Number of Electrons

d)

Atomic Mass

69.

Most of the mass in an atom is concentrated in the...

a)

electrons

b)

nucleus

c)

protons

d)

empty space

70.

Electrons are___________

a)

Extremely small even in comparison to protons.

b)

part of the nuclues.

c)

Super Positive, like cheerleaders!

d)

very large

71.

Anything that has mass and takes up space is called

a)

heterogeneous

b)

homogeneous

c)

matter

d)

density

72.

An atoms overall charge is

a)

positive

b)

depends on its mood

c)

neutral

d)

negative

73.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
74.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
75.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
76.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
77.
If there is no subscript, there is ______ atom(s) of that element.
a)
0
b)
2
c)
only 1
d)
1 million
78.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
79.
How many atoms are in the element Carbon in this compound?
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
80.
How many TOTAL atoms are in this compound?
H2C3O4N5
a)
5
b)
14
c)
15
d)
19
81.
How many elements are present in this compound?
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
82.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
83.
When the number of electrons equals the number of protons the atom has what charge?
a)
sponge bob
b)
positive charge
c)
negative charge
d)
neutral charge
84.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
85.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible

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