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Unit 2 Test Review
Unit 2 Test Review
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Atoms, Elements, and the Periodic Table
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Questions
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Answers
1
Dalton’s atomic theory states all of the following except
All elements are composed of atoms.
Atoms of the same element are exactly alike.
Atoms contain protons, neutrons, and electrons.
Atoms are indivisible and indestructible particles.
2
What is the most abundant element in the atmosphere
Hydrogen
Oxygen
Helium
Nitrogen
3
The dot diagram for elements in the alkali metals will have how many dots?
1
5
7
2
4
How many neutrons does a single iron atom contain?
30
55.847
26
56
5
An ion is an atom with the same number of protons but a different number of electrons
True
False
6
What is the atomic number of iron?
56
26
55.847
30
7
The dot diagram for elements in the halogen family will have how many dots?
7
6
5
8
8
One of the main conclusions of Rutherford’s gold leaf experiment was... ?
Atoms are mostly empty space
Atoms are incredibly heavy
Electrons have positive charge
Protons have negative charge
9
What is the most abundant metal in the Earth's crust?
Aluminum
Oxygen
Silicon
Iron
10
Using your periodic table, how many valence electrons does Oxygen have?
6
2
16
8
11
J.J. Thomson discovered which subatomic particle and what was his experiment called?
Neutrino- Planetary Model experiment
Neutron- neutron radiation experiment
Proton- Gold Foil experiment
Electron- cathode ray tube experiment
12
All of the following elements can be found in the Boron group except...
Thallium
Aluminum
Boron
Carbon
13
Electrons have __________ charge.
Positive
Negative
Neutral
14
All of the following elements can be found in the Oxygen group except...
Oxygen
Thallium
Tellurium
Sulfur
15
What is the most abundant element in the Earth's crust?
Nitrogen
Oxygen
Helium
Hydrogen
16
John Dalton theorized the existence of atoms based on which
two
theories?
Law of Multiple Proportions
Law of Conservation of Energy
Law of Definite Proportions
Law of Conservation of Mass
17
All of the following elements can be found in the Nitrogen group except...
Arsenic
Phosphorus
Nitrogen
Aluminum
18
If the number of neutrons within an atom changes, choose all of the following that would also change
element name
mass
none of the above would change
charge
19
Which scientist is credited with developing the Plum Pudding Model of the atom?
Neil Bohr
James Chadwick
J.J. Thomson
Ernest Rutherford
20
The Greek word,
atomos,
means "tiny" or "small"
True
False
21
If the number of electrons within an atom changes, choose all of the following that would also change
charge
element name
none of the above would change
mass
22
The Bohr Diagram for Oxygen should have two shells.
False
True
23
An ion is an atom with the same number of neutrons but a different number of protons
True
False
24
Who is responsible for the discovery of the neutron?
James Chadwick
Neil Bohr
Ernest Rutherford
J.J. Thomson
25
An inference is a conclusion reached on the basis of evidence.
True
False
26
The word atom originates from the Greek term atomos.
True
False
27
What group(s) make up the noble gases?
8b
17
8a
7a
28
How many dots would the Lewis dot diagram for Helium have?
2
18
4
8
29
If the number of protons within an atom changes, choose one of the following that would also change
none of the above would change
mass
charge
element name
30
An observation is the process of obtaining information through the senses
True
False
31
Ernest Rutherford discovered which subatomic particle and what was the experiment called?
Neutron- neutron radiation experiment
Proton- gold foil experiment
Neutrino- Planetary Model experiment
Electron- cathode ray tube experiment
32
The current atomic model is the Quantum model
False
True
33
The Bohr model represents what element?
nitrogen
boron
carbon
silicon
34
The mass of atoms are measured in what units?
milligrams
atomic mass units
grams
liters
35
What group(s) make up the transition metals
3b-12b
3a-12a
13-18
3
36
How do you calculate the number of neutrons in an atom?
# n = #p
Atomic mass - atomic number
atomic number
# n = # e
37
Neutrons have __________ charge.
Positive
Neutral
Negative
38
Protons have __________ charge.
Positive
Negative
Neutral
39
Dmitri Mendeleev is responsible for developing the... ?
Plum Pudding Model
Periodic Table of the Elements
Planetary Model of the Atom
Quantum Model of the Atom
40
Protons and Neutrons are "heavy" and electrons are extremely "light"
False
True
41
How many protons does a single iron atom contain?
30
55.847
26
56
42
How many electrons does a single iron atom contain?
56
55.847
30
26
43
Protons and Electrons exist in the nucleus of the atom
True
False
44
What element is in Period 4, Group 6a?
There is not an element
Selenium
Chromium
Hafnium
45
Which scientist is credited with developing the Planetary Model of the atom?
J.J. Thomson
James Chadwick
Ernest Rutherford
Neil Bohr
46
An isotope is an atom with the same number of protons but a different number of electrons
False
True
47
An isotope is an atom with the same number of protons but a different number of neutrons
False
True
48
Which scientist discovered evidence of atoms by studying grains of pollen under a microscope and what was this coined?
Neil Bohr- Planetary Motion
Ernest Rutherford- Nuclear Motion
John Dalton- Atomic Motion
Robert Brown- Brownian Motion
49
The number of protons in an atom with an atomic number of 8 is... ?
4
16
2
8
50
The Greek philosopher to theorize that matter could not be divided into smaller and smaller pieces forever.
Aristotle
Republicus
Dalton
Democritus
