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