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WorksheetsEnd of module 3 Review Packet
Total questions: 100
Worksheet time: 3hrs 31mins
How many neutrons are in Magnesium?
36
12
24
6
How many electrons are in Sulfur?
32
16
48
8
Which would you do to change this Lithium to a new element?
Add a neutron
Add an electron
Add a proton
Add a proton and neutron\
Which atom will have a +1 charge?
3 protons
4 neutrons
3 electrons
3 protons
4 neutrons
4 electrons
3 protons
4 neutrons
2 electrons
3 protons
3 neutrons
3 electrons
41.996 amu
42.194 amu
10.432 amu
40.048 amu
What atomic particle determines the element?
protons
neutrons
electrons
nucleus
What particle in the atom has no charge and a mass of 1?
proton
neutrons
electrons
ion
What particle(s) have a charge?
protons only
electrons only
protons and electrons
electrons and neutrons
(challenge) An atom has 10 protons and 10 electrons. What happens to the charge if you add 1 more electron?
It becomes a negative ion
It becomes a positive ion
nothing changes
It becomes a different element
An atom of HELIUM has 2 protons. If you add 1 more proton, what happens?
It becomes an ion
It becomes a different kind of element
Nothing
Challenge: what is the mass of an atom with 2 protons, 2 neutrons, and 2 electrons?
mass = 2
mass = 4
mass = 6
mass = 8
The atomic number is the same as......
the number of protons
the number of electrons
the number of neutrons
the number of protons plus neutrons
How many neutrons does lithium have?
3
4
6
7
What is the best mass number for silver?
47
107
108
154
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
What is the mass number?
the number of protons in the nucleus
the number of protons and neutrons in the nucleus
the number of neutrons in the nucleus
the number of protons and electrons in the atom
What does the 6 represent?
Atomic mass
atomic number
chemical symbol
element name
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
20
10
35
25
Which of the following determines the identity of an element?
number of protons
atomic mass
number of neutrons
number of shells
Who came up with the first atomic theory?
Dalton
Socrates
Thomas
Rutherford
What did Rutherford discover about atoms?
An atom is always negatively charged.
An atom is mostly empty space, but has a dense positively charged center(nucleus).
An atom is always positively charged.
All particles will pass straight through gold foil with no change in path.
What did Rutherford discover in his experiment?
nucleus
electrons
neutrons
protons
Rutherford's "gold-foil" experiment using alpha particle scattering concluded that
the center of the atom is empty
atomic mass is spread over the whole atom
the center of the atom has a negative charge
most of the atom is empty
Who was considered as one of the founders of the ancient atomist theory?
Aristotle
Parmenides
Empedocles
Democritus
It is the smallest particle of an element
PROTON
ELECTRON
NEUTRON
ATOM
In Geiger-Marsden experiment, most of the alpha particles that was fired towards the gold foil were undeflected. What does it say about the atom?
The atom is neutral
The atom is made up mostly of empty space
The atom is does not interact to the alpha particles
Alpha particles have the same charge as the nucleus
What is the charge of an alpha particle?
2
+2
-2
+4
An element has three isotopes. Given the abundances and relative masses, calculate the average atomic mass and determine (from the periodic table) which element it is.
Abundances | Relative masses
0.005% | 234.04 amu
0.720% | 235.04 amu
99.275% | 238.05 amu
Uranium (#92, Atomic Mass: 238.03 amu)
Fluorine (#9, Atomic Mass: 19.00 amu)
Mercury (#89, Atomic Mass: 200.59 amu)
Polonium (#84 209 amu)
Rubidium has two naturally occurring isotopes, 85Rb (relative mass 84.9118 amu) and 87Rb (relative mass 86.9092 amu). The abundance of 87Rb is 27.8%, If rubidium has an average atomic mass of 85.47 amu, what is the % abundance of 85Rb (in percent)?
27.9%
72.1%
74.63%
34.29%
The atomic mass of an element is the ___.
average of the mass number and the atomic number for the element
weighted average of the masses of the isotopes of the element
total mass of the isotopes of the element
total number of subatomic particles in the nucleus
The atomic mass of an element depends upon the ___.
relative abundance of protons in that element
mass and relative abundance of each isotope of that element
mass of each isotope of that element
mass of each electron in that element
Chlorine has two naturally occurring isotopes, Cl-35 and Cl-37, The atomic mass of chlorine is 35.45. Which of these two isotopes of chlorine is more abundant?
Cl-35
Cl-37
Cannot be determined from the information provided.
How many protons does this element have?
Calculate the average atomic mass of the element iron (Fe) using the following data:
[Isotope / % abundance]
[Iron 54 / 6% ] [Iron 56 / 92% ] [ Iron 57 / 2% ]
53.7 amu
54.9 amu
5592.0 amu
55.9 amu
Aluminum-27
An atom with 14 protons and 13 neutrons
Rubidium has two naturally occurring isotopes, 85Rb (relative mass 84.9118 amu) and 87Rb (relative mass 86.9092 amu). The abundance of 87Rb is 27.8%, If rubidium has an average atomic mass of 85.47 amu, what is the % abundance of 85Rb (in percent)?
27.9%
72.1%
74.63%
34.29%
What is the average atomic mass for thallium, Tl, if there are two isotopes with the following masses and abundances? Tl-203 has a mass of 203 amu with an abundance of 29.5 % Tl-205 has a mass of 205 amu with an abundance of 70.5 %
203.12 amu
204.31 amu
204.41 amu
204.0 amu
A sample of cesium is 75% Cs-133, 20% Cs-132, and 5% Cs-134. What is the average atomic mass?
132.97 amu
133.00 amu
133.16 amu
132.85 amu
Which radioactive particle has this symbol?
Alpha
Beta
Gamma
Nuclear
Which radioactive particle has this symbol?
Alpha
Beta
Gamma
Nuclear
Which type of radioactivity is in the form of waves, rather than particles?
Alpha
Beta
Gamma
Nuclear
What is the name of this isotope?
Magnesium
Magnesium-22
Magnesium-12
Magnesium-10
Which type of nuclear reaction splits a large unstable nucleus into smaller ones?
Fission
Fusion
Which type of nuclear reaction combines smaller particles into a larger one?
Fission
Fusion
A beta particle is also called _____.
an isotope
a mass number
an electron
a fusion
Protons, electrons
Protons, neutrons
Electrons, neutrons
An alpha particle is made up of
2 protons and 4 neutrons
1 proton and 1 neutron
2 protons and 2 neutrons
4 protons and 2 neutrons
Which type of nuclear radiation can be stopped by a sheet of paper?
Alpha
Beta
Gamma
Alpha decay
Beta decay
Gamma decay
When a substance undergoes beta decay
The atomic number increases by 1
The atomic number decreases by 2
The atomic number does not change
Which type(s) of radiation is a fast moving electron?
alpha
beta
gamma
alpha and beta
beta and gamma
Which type(s) of radiation can pass through paper?
alpha
beta
gamma
alpha and beta
beta and gamma
Look at the diagram of an atom of a common element. What is the atomic number?
3
4
7
10
Look at the diagram of an atom of a common element. What is the mass number?
3
4
7
10
Two isotopes of the same element have
the same number of protons but different numbers of neutrons
the same number of protons but different numbers of electrons
the same number of neutrons but different numbers of protons
the same number of electrons but different numbers of protons
A radioactive isotope is a substance that
will eventually gain electrons through bonding
will become stable by cooling down
is unstable and will 'decay' by losing particles
is not found naturally on the Earth
When Uranium decays it emits an alpha particle, forming an isotope of Thorium. Which of the above decay equations is correct?
A
B
C
D
In the above decay equation, what are the missing numbers x and y?
A
B
C
D
A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.
more
less
identical
small
Why does alpha decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
Why does beta decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
Why does gamma decay occur?
The nucleus is too large to be stable
The proton to neutron ratio is unstable
The nucleus is in an excited state. This usually follows other types of decay.
gamma waves
has a high penetrating power
has a lower penetrating power
has a medium penetrating power
Alpha particles
has a high penetrating power
has a lower penetrating power
has a medium penetrating power
if Phosphorus-32 decay into beta reaction the result will be:
Sulfur- 28
Sulfur-32
Al-32
fission is:
the process of splitting an atom
the process by which multiple small atomic nuclei join together to form a heavier nucleus
the sum of all protons and neutrons
fusion is:
the process of splitting an atom
the process by which multiple small atomic nuclei join together to form a heavier nucleus
the sum of all protons and neutrons
if Thorium-228 decay into alpha reaction the result will be
Pa-228
Ac-228
Ra-224
if Thorium-228 decay into a positron reaction the result will be
Pa-232
Ac-228
Ra-224
this reactions is an example of
fission
fusion
this reaction is an example of:
fission
fusion
Which particles are in the nucleus of an atom?
Electrons and Protons
Positrons and Neutrons
Protons and Neutrons
Electrons and Neutrons
In nuclear fission, the nucleus...
heats up until it burn.
splits up with the release of energy.
fuses to form a heavier nucleus with the release of energy.
accepts electrons with the release of energy.
During nuclear fusion, nuclei...
heat until they burn up.
split with the release of energy.
fuse to form a heavier nucleus with the release of energy.
accept electrons with the release of energy.
Electrons not involved in nuclear reactions because ...
their negative charge reduces the energy released during nuclear explosions.
they are not in the nucleus.
electrons will reverse nuclear explosions.
electrons absorb too much of the energy produced.
Which of the following nuclei would be an isotope of Sodium (Atomic Number 11)?
