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Ions and Isotopes Practice

Total questions: 60

Worksheet time: 36mins

Name
Class
Date
1.
Negative ions are called
a)
Cations
b)
Electrons
c)
Anions
d)
Neutrons
2.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
3.
Positive ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
d)
gain or share
4.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
5.
What charge does an atom have if it LOSES an electron? 
a)
Positive (+)
b)
Negative (-)
6.
When an atom LOSES an electron it is a
a)
cation
b)
anion
7.
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
8.
A negative ion is a 
a)
cation
b)
anion
9.
Valence electrons are: 
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
10.
What is the number of protons?
a)
34
b)
16
c)
18
d)
S
11.
What is the number of neutrons?
a)
34
b)
79
c)
45
d)
35
12.
If you have 10 protons and 9 neutrons, what would the mass number be?
a)
19
b)
9
c)
10
d)
1
13.
What is the definition of isotope?
a)
atoms of an element with different numbers of neutrons.
b)
materials break down over time at a very consistent rate
14.
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
15.

An atom with the same number of protons and electrons (no charge) and the expected atomic mass or number of neutrons from the periodic table.

a)

Neutral/Normal Atom

b)

Ion

c)

Isotope

16.

An atom that has gained or lost electrons in an attempt to become stable/bond with another atom.

a)

Normal/Neutral Atom

b)

Ion

c)

Isotope

17.

Atoms of the same element that have different mass than expected because they have a different number of neutrons.

a)

Neutral Atom

b)

Ion

c)

Isotope

d)

Cation

18.

If an ion has a positive charge you would __________ the charge number from the number of protons to figure out how many electrons there are.

a)

subtract

b)

add

c)

multiply

d)

divide

19.

If an ion has a negative charge you would __________ the charge number to the number of protons to figure out how many electrons there are.

a)

Add

b)

Subtract

c)

Divide

d)

Multiply

20.

You need to look at the ______________ on the periodic table to figure out if an atom is an isotope or not.

a)

atomic number

b)

symbol

c)

element name

d)

atomic mass

21.

If an atom has 9 protons and 10 electrons it has a charge of ____.

a)

0

b)

-1

c)

+1

d)

-2

22.

If an atom has 4 protons and 2 electrons it has a charge of ____.

a)

0

b)

-2

c)

+2

d)

+1

23.

If an atom has a charge of +3 and an atomic number of 5 it should have _______ electrons.

a)

1

b)

2

c)

3

d)

4

24.

If an atom has a charge of -2 and an atomic number of 16 it should have _______ electrons.

a)

14

b)

16

c)

18

d)

20

25.

If an atom has a charge of 0 (neutral) and an atomic number of 8 it should have ____ electrons.

a)

0

b)

8

c)

7

d)

9

26.

If an atom has an expected atomic mass of 14, and it has 7 protons and 8 neutrons it is a ____________.

a)

Anion

b)

Normal Atom

c)

Isotope

d)

Cation

27.

If an atom has an expected atomic mass of 12, and it has 6 protons and 6 neutrons it is a ____________.

a)

Normal Atom

b)

Isotope

c)

Cation

d)

Anion

28.

To figure out the mass of an atom based on its subatomic particles you would add ______ & ________.

a)

Protons & Electrons

b)

Protons & Neutrons

c)

Neutron & Electrons

29.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O-2

30.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

31.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

32.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

33.

What type of atom is this?

a)

Normal Atom

b)

Cation

c)

Anion

d)

Isotope

34.

How many electrons does this magnesium ion have?

a)

24

b)

12

c)

10

d)

14

35.

What does it change in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

36.

How many neutrons does this Neon atom have?

a)

21

b)

11

c)

10

d)

12

37.

What does it happen to this atom?

a)

It LOSES electrons

b)

It GAINS electrons

c)

It GAINS protons

d)

It LOSES protons

38.

What is the atomic number of this element?

a)

12

b)

24

c)

23

39.

What type of atom is element C?

a)

Normal atom

b)

Ion

c)

Isotope

40.

What is the mass number of this element?

a)

12

b)

24

c)

23

d)

11

41.

Atoms of the same element with a different number of electrons are called ___________.

a)

elements

b)

isotopes

c)

ions

d)

neutral

42.

Which subatomic particle is used to identify the atom, as it never changes?

a)

Protons

b)

Neutrons

c)

Electrons

43.

How many neutrons are in the following atom?

a)

47

b)

61

c)

108

d)

155

44.

How many protons are in the following atom?

a)

82

b)

125

c)

207

d)

189

45.

How many neutrons are in the isotope Carbon-14?

a)

6

b)

8

c)

12

d)

14

46.

Monatomic ions, consist of a ............... atom

a)

More than two

b)

two

c)

single

47.

A ..................... ion is composed of more than one atom and behaves as a unit and carries a charge.

a)

Monoatomic

b)

diatomic

c)

polyatomic

48.

Write the symbol for aluminum ion.

a)

Al3+

b)

Al3-

c)

Al5+

49.
The elements on the left side of the periodic table are generally always ______ and the elements on the right side of the periodic table are generally always ______.
a)
cations; anions
b)
anions; cations
c)
reactive; non-reactive
d)
non-reactive; reactive
50.
Why are ions formed?
a)
To make our lives difficult
b)
Because atoms want 8 valence electrons
c)
Because atoms have the same number of protons and electrons
d)
Because atoms gained neutrons
51.
Group 17 always has ions with a charge of 
a)
+1
b)
+2
c)
-1
d)
-2
52.
If an element has 3 valence electrons, what charge will likely form on its ion ?
a)
+3
b)
+5
c)
-3
d)
-5
53.
Which of the following has a -3 charge?
a)
Boron
b)
Fluorine
c)
Nitrogen
d)
Neon
54.
charge of beryllium ion
a)
-2
b)
-1
c)
+1
d)
+2
55.
Which of the following has a -1 charge? 
a)
Aluminum
b)
Bromine
c)
Calcium
d)
Potassium
56.

An atom of an element forms a 2+ ion. In which group on the Periodic Table could this element be located?

a)

1

b)

2

c)

13

d)

17

57.

What are valence electrons

a)

The outer most electrons

b)

The inner most electrons

c)

The 2nd and 3rd electron to be added to the orbital

d)

The electrons that are pulled off due to frcition

58.

How many Valence electrons are there?

a)

4

b)

3

c)

2

d)

1

59.

There are 2 protons and 2 electrons. What is the charge?

a)

He +1

b)

He +2

c)

He

d)

He -1

60.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens

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