WorksheetsAtoms, Isotopes, and Ions
Total questions: 61
Worksheet time: 1hrs 27mins
Name
Class
Date
1.
Positive ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
d)
gain or share
2.
What charge does an atom have if it LOSES an electron?
a)
Positive (+)
b)
Negative (-)
3.
When an atom LOSES an electron it is a
a)
cation
b)
anion
4.
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
5.
A negative ion is a
a)
cation
b)
anion
6.
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
7.
What charge does an atom have if it GAINS an electrons?
a)
Positive (+)
b)
Negative (-)
8.
What is the number of neutrons?
a)
34
b)
79
c)
45
d)
35
9.
If you have 10 protons and 9 neutrons, what would the mass number be?
a)
19
b)
9
c)
10
d)
1
10.
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
11.
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
12.
What are the names of the horizontal rows on the periodic table?
a)
The periods
b)
The Groups
c)
The Non-Metals
d)
Ionization Energies
13.
What is an example of an Isotope
a)
Cu
b)
C02
c)
H2O
d)
C-14
14.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
15.
Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two protons.
a)
true
b)
false
16.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
17.
which atom has 4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
18.
Different versions of an element, with differing numbers of neutrons, are called _____
a)
isosceles
b)
isomers
c)
isotopes
d)
isicless
19.
Rounding the atomic weight to the nearest whole number gives us the _____
a)
proton number
b)
mass number
c)
nucleon number
d)
average weight
20.
number of neutrons = _____
a)
atomic number - mass number
b)
isotope number - atomic weight
c)
mass number - atomic weight
d)
mass number - atomic number
21.
The nucleus contains _____
a)
only protons
b)
protons and neutrons
c)
protons and electrons
d)
electrons and neutrons
22.
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is
a)
13
b)
14
c)
27
d)
40
23.
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
24.
How many neutrons does an atom of Nitrogen-13 have?
a)
6
b)
7
c)
13
d)
5
25.
How many neutrons does an atom of the isotope Neon-22 have?
a)
12
b)
10
c)
22
d)
20
26.
What is the charge does a sodium ion have?
a)
+2
b)
+1
c)
-1
d)
-2
27.
How many protons and electrons does the ion N3- have?
a)
7, 7
b)
7, 9
c)
10, 7
d)
7, 10
28.
Lithium - 8 has how many neutrons?
a)
3
b)
4
c)
5
d)
6
29.
An isotope with 17 protons and 20 neutrons
a)
Calcium - 17
b)
Calcium - 37
c)
Chlorine - 20
d)
Chlorine - 37
30.
Aluminum is this type of element.
a)
Metal
b)
Metalloid
c)
Non-Metal
31.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
32.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
33.
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
a)
100.0g
b)
50.0g
c)
12.5g
d)
8.5g
34.
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
a)
100.0g
b)
50.0g
c)
12.5g
d)
8.5g
35.
Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?
a)
0.25g
b)
2.5g
c)
25g
d)
80g
36.
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
a)
3.0g
b)
0.25mg
c)
0.3g
d)
0.25g
37.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
38.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
39.
Barium atoms want to form...
a)
an anion
b)
a cation
c)
an onion
d)
a cuddly kitten friend
40.
An Arsenic atom wants to form...
a)
An anion
b)
A cation
c)
An onion
d)
A cuddly kitten friend
41.
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
42.
Cations are...
a)
Positive
b)
Negative
c)
Neutral
d)
Purring
43.
Anions are...
a)
Positive
b)
Negative
c)
Neutral
d)
Crying
44.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
45.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
46.
A Silicon atom wants...
a)
3 more electrons
b)
3 less electrons
c)
4 more or less electrons
d)
2 more electrons
47.
A Radium atom wants...
a)
One more electron
b)
One less electron
c)
Two more electrons
d)
Two less electrons
48.
Which particles change the charge in atoms when ions are formed?
a)
Protons
b)
Electrons
c)
Neutrons
d)
Kittens
49.
What is the ionic symbol for Krypton?
a)
Kr
b)
Kr+
c)
Kr-
d)
Kr-2
50.
What is the ionic symbol for a Tin atom?
a)
Sn+4 or Sn-4
b)
Sn-4
c)
Sn+3
d)
Sn-3
51.
What is the ionic symbol for a Gallium atom?
a)
Ga+3
b)
Ga-3
c)
Ga+2
d)
Ga-2
52.
Make sure you get enough Potassium in your diet!
a)
Huh?
b)
K
c)
I <3 bananas
d)
Sure
53.
What is the ionic symbol for a phosphorus atom?
a)
P-3
b)
P+3
c)
P-2
d)
P+2
54.
Barium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?
a)
0.25g
b)
2.5g
c)
25g
d)
80g
55.
The time required for one half of a sample of a radioisotope to decay is called:
a)
half-time
b)
half-life
56.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
57.
Which of the following is an acceptable Lewis structure for CH3Cl?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
58.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
59.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
60.
How do the following two elements bond together?
Cr3+ O2-
Cr3+ O2-
a)
CrO
b)
Cr3O2
c)
Cr2O3
d)
CrO3
61.
How do the following two elements bond together?
K1+ S2-
K1+ S2-
a)
KS
b)
K8S
c)
K6S3
d)
K2S
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