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HC U2 Unit Review MC

Total questions: 72

Worksheet time: 58mins

Name
Class
Date
1.

Cations have what charge?

a)

+

b)

-

2.

Anions are what charge?

a)

+

b)

-

3.

Cations will

a)

Lose electrons

b)

Gain electrons

4.

This isotope have how many neutrons?

a)

26

b)

12

c)

14

d)

16

5.

Which of the Chlorine [Cl] is heavier?

a)

Cl-37

b)

Cl-35

6.

For Cl 37, what does the 37 represent?

a)

Number of Protons

b)

Number of Neutrons

c)

Number of Electrons

d)

Atomic Mass Number

7.

Electrons are...

a)

Positive charge

b)

Negative charge

c)

Neutral/No charge

8.

Protons are...

a)

Positive charge

b)

Negative charge

c)

Neutral/No charge

9.

Which particles are NOT inside the nucleus of atoms?

a)

Protons

b)

Electrons

c)

Neutrons

10.

Which atom will have a +1 charge?

a)

3 protons

4 neutrons

3 electrons

b)

3 protons

4 neutrons

4 electrons

c)

3 protons

4 neutrons

2 electrons

d)

3 protons

3 neutrons

3 electrons

11.

Which would you do to change this Lithium to a new element?

a)

Add a neutron

b)

Add an electron

c)

Add a proton

d)

Add a proton and neutron\

12.

How many electrons are in Sulfur?

a)

32

b)

16

c)

48

d)

8

13.

How many neutrons are in Magnesium?

a)

36

b)

12

c)

24

d)

6

14.
What is the atomic number of the atom pictured? 
a)
9
b)
10
c)
18
d)
19
15.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
16.

Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.

a)

neutrons ; atomic numbers

b)

protons ; atomic numbers

c)

electrons ; mass numbers

d)

neutrons ; mass number

17.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
18.

What is Oxygen's atomic number?

a)

16

b)

8

c)

-2

d)

10

19.

What is this atom's atomic mass?

a)

16

b)

8

c)

-2

d)

10

20.

How many neutron's does this atom have?

a)

16

b)

8

c)

-2

d)

10

21.

Determine the relationship between the following atoms:

a)

The same atom

b)

Isotopes of the same element

c)

A different element

22.

Determine the relationship between the following atoms:

a)

The same atom

b)

Isotopes of the same element

c)

A different element

23.

Determine the relationship between the following atoms:

a)

The same atom

b)

Isotopes of the same element

c)

A different element

24.

Determine the relationship between the following atoms:

a)

The same atom

b)

Isotopes of the same element

c)

A different element

25.
The central region of an atom where neutrons and protons are located is the __________________.
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
26.

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

a)

Atom is mostly empty space

b)

The nucleus is positively charged

c)

The atom has a small dense nucleus

d)

All answers are correct

27.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
28.
How many electrons does this picture show?
a)
4
b)
5
c)
6
d)
3
29.
The number in the upper corner of an element tile (7 for nitrogen) is called _____
a)
the proton number
b)
the atomic number
c)
the electron number
d)
the mass number
30.
If an atom contains exactly three protons, then it's an atom of _____
a)
lithium
b)
gold
c)
nitrogen
d)
carbon
31.

Which part of an atom is used to identify it?

a)

number of protons

b)

number of neutrons

c)

number of electrons

32.
How did Rutherford discover the proton?
a)
Cathode tube ray experiment
b)
Gold Foil Experiment
c)
Planetary Model
d)
Plum Pudding Model
33.

What did Rutherford theorize about the center of an atom?

a)

The center of an atom was made of negatively charged electrons

b)

The center of an atom was mostly empty space

c)

The center of an atom was a dense nucleus surrounded by light, fast-moving electrons

d)

The center of an atom was 10,000 times smaller than the size of the atom

34.

What did Rutherford's discovery mean about everything in the world?

a)

Everything in the world is made of negatively charged electrons

b)

Everything in the world is made of positively charged protons and neutral neutrons

c)

Everything in the world is made almost entirely of empty space

d)

Everything in the world is made of a dense nucleus surrounded by light, fast-moving electrons

35.

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

36.

How many electrons would a Calcium if it looses its 2 valence electrons.

a)

22

b)

20

c)

18

d)

38

37.

Na has 1 valence electron. What would be its charge if it lost that electron?

a)

+1

b)

+2

c)

-1

d)

-2

38.
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
39.

How many neutrons does C-14 contain? (tap to enlarge the image)

a)

6

b)

7

c)

14

d)

8

40.

ALL atoms of the same element have:

a)

same number of proton

b)

same number of nucleon

c)

different number of neutron

d)

different number of electron

41.

ALL atoms of the same element have:

a)

same number of proton

b)

same number of nucleon

c)

different number of neutron

d)

different number of electron

42.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
43.
Oxygen has 8 protons. What is oxygen's atomic number?
a)
16
b)
8
c)
15.999
d)
0
44.
If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, its atomic mass is:
a)
16
b)
32
c)
48
45.
If a hydrogen atom has 1 proton, 1 electron, and 1 neutron, its atomic number is:
a)
1
b)
2
c)
3
46.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

47.
An atom is electrically neutral when
a)
protons and neutrons are the same
b)
protons and electrons are the same
c)
neutrons and electrons are the same
d)
neutrons balance the protons and electrons
48.
Iron-60 (atomic number 26) is an isotope that is often used to study meteorites.  How many neutrons does iron-60 have?
a)
26
b)
60
c)
34
d)
86
49.
If the number of electrons in an atom changes you make a(n) __________________.
a)
ion
b)
isotope
c)
new element
d)
isomer
50.

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

a)

34

b)

36

c)

2

d)

40

51.

The number of protons + neutrons in an atomic nucleus is referred to as what?

a)

Atomic number

b)

Mass number

52.

Atoms of the same element with differing numbers of neutrons are _______________.

a)

isotopes

b)

ions

c)

elements

d)

nucleus

53.
What is the charge on a lithium atom that looses 1 electron?
a)
+1
b)
0
c)
-1
d)
-2
54.
Is the element shown in this image an ion, isotope or normal atom?
a)
atom
b)
isotope
c)
cation (+ ion)
d)
anion (- ion)
55.
Helium (He atomic number 2) has 2 protons, 2 neutrons, and 2 electrons) is the He element shown above an atom, an element, or an isotope?
a)
atom
b)
cation  (+ ion)
c)
isotope
d)
anion (-)
56.
Which atom has  4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
57.
Carbon has an atomic number of 6 and an atomic mass of 12. Which elements are considered isotopes of carbon?
a)
Carbon-12
b)
Carbon-13
c)
Carbon-14
d)
Both Carbon-13 and Carbon-14
58.

How many electrons does this magnesium ion have?

a)

24

b)

12

c)

10

d)

14

59.

What is an isotope?

a)

A charged atom

b)

Two atoms of the same element with different amounts of neutrons

c)

Two atoms of the same element with different amounts of protons

d)

A neutral atom

60.
What is the name of the pictured isotope?
a)
Carbon-12
b)
Carbon-13
c)
Carbon-14
d)
Carbon-15
61.
Which answer choice describes the subatomic particles and their respective charges?
a)
p-    e+    n
b)
p+    e     n-
c)
p+    e-    n
d)
p-     e+    n
62.
a)
Neutrons = Mass Number + Atomic Number
b)
Neutrons = Mass Number - Atomic Number
c)
Neutrons = Atomic Number + Electrons
d)
Neutrons = Atomic Number - Electrons
63.
a)
Mass Number = Atomic Number + Neutrons
b)
Mass Number = Atomic Number - Neutrons
c)
Mass Number = Atomic Number + Electrons
d)
Mass Number = Atomic Number - Electrons 
64.
a)
Protons and Neutrons
b)
Protons and Electrons
c)
Neutrons and Electrons
d)
Neutrons and Valence Electrons
65.

An atom has a mass number of 23 and atomic number 11. The number of protons is _________.

a)

11

b)

12

c)

23

d)

44

66.

Because atoms are neutral, each positive charge is

a)

the same as a neutral charge.

b)

balanced by a negative charge.

c)

the same as no charge.

d)

balanced by a neutral charge.

67.
What is the atomic number of the atom pictured? 
a)
11
b)
12
c)
22
d)
23
68.
 What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
69.

What is shown here?

a)

two different isotopes

b)

two different ions

c)

two different elements

70.

A calcium ion has 20 neutrons, 20 protons, and 18 electrons. What is the ion's charge?

a)

2+

b)

1+

c)

2-

d)

1-

71.

Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of

a)

(a) electron

b)

(b) proton

c)

(c) nucleus in the atom

d)

(d) atomic mass

72.

Hydrogen exists in three isotopic forms, 11H, 21H, 31H known as protium, deuterium and tritium. Why are all the isotopes neutral in nature?

a)

(a) Since neutrons are neutral in nature hence isotopes are electrically neutral

b)

.(b) All the isotopes have one electron and one proton, hence they are neutral.

c)

(c) All the isotopes have one proton and one neutron, hence they are neutral.

d)

(d) Increasing number of protons in the isotopes make them neutral.

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