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Q 1/82
Score 0
The smell of the ocean is caused by atoms.
45
TRUE
FALSE
Q 2/82
Score 0
John Dalton was the first person recorded as thinking that matter was ultimately composed of atoms.
45
FALSE
TRUE
82 questions
Q.
The smell of the ocean is caused by atoms.
1
45 sec
Q.
John Dalton was the first person recorded as thinking that matter was ultimately composed of atoms.
2
45 sec
Q.
John Dalton formalized an atomic theory that gained acceptance in the early 19th century.
3
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Q.
The plum pudding model proposed that negatively charged electrons were held in a sphere of positive charge.
4
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Q.
All of the positive charge of an atom is concentrated in the nucleus.
5
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Q.
J.J. Thomson discovered the existence of protons.
6
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Q.
Ernest Rutherford proved the existence of electrons.
7
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Q.
The gold foil experiment proved that large regions of the atoms consisted of empty space.
8
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Q.
The nucleus of an atom is a very small, dense region that contains over 99.9% of the atomic mass.
9
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Q.
Protons and electrons each have a mass of 1 amu.
10
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Q.
A positive charge attracts negative charges and repels other positive charges.
11
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Q.
The mass of a proton is exactly the same as the mass of a neutron.
12
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Q.
The charges on electrons and neutrons cancel each other to give neutral atoms.
13
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Q.
Protons and neutrons have similar masses and similar electrical charges.
14
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Q.
An atom containing 8 protons, 9 neutrons, and 8 electrons would be considered charge-neutral.
15
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Q.
The number of protons in an atom's nucleus defines the element.
16
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Q.
If two atoms each contain different numbers of protons, the atoms must be from different elements.
17
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Q.
All elemental symbols are comprised of a two-letter abbreviation.
18
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Q.
The elemental symbol for manganese is Mg.
19
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Q.
All carbon atoms have exactly 6 protons.
20
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Q.
The atomic number of nitrogen is 14.01.
21
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Q.
Mendeleev is best remembered for his pioneering work on determining atomic structure.
22
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Q.
Mendeleev's early periodic table predicted the existence of elements that had yet to be discovered.
23
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Q.
In the modern periodic table, elements are listed in order of increasing atomic number rather than increasing relative mass.
24
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Q.
Metals are located on the left side of the periodic table.
25
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Q.
The elements within a group on the periodic table tend to have similar properties.
26
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Q.
Group 2A elements are called alkali metals.
27
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Q.
An element is discovered that is a solid, has one valence electron, and readily forms a 1+ ion. This element would be correctly classified as a nonmetal.
28
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Q.
Main-group elements tend to form ions that have the same number of total electrons as the nearest halogen.
29
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Q.
A cation forms when an atom gains an electron.
30
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Q.
Halogens form anions with a 1- charge.
31
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Q.
Isotopes are atoms of the same element that have a different numbers of neutrons.
32
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Q.
The atomic mass of individual atoms of an element may vary.
33
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Q.
The relative amount of each different isotope in a naturally occurring sample of an element is always the same.
34
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Q.
The atomic mass of a single carbon atom is equal to exactly 12.011 amu.
35
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Q.
Which statement below accurately describes the contributions of Democritus?
36
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Q.
Which statement below accurately describes the contributions of Dalton?
37
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Q.
Which of the following is NOT part of Dalton's Atomic Theory?
38
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Q.
Which statement below accurately describes the contributions of Thomson?
39
45 sec
Q.
Which statement reflects the results of Rutherford's gold foil experiments?
40
45 sec
Q.
An atom containing 7 protons, 8 neutrons, and 7 electrons:
41
45 sec
Q.
The atomic mass unit is defined as:
42
45 sec
Q.
Which of the following elements has an atomic number of 4?
43
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Q.
Which of the following elements has only 12 protons?
44
45 sec
Q.
What is the atomic symbol for silver?
45
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Q.
What is the atomic symbol for tin?
46
45 sec
Q.
Which of the following is NOT a correct name, symbol combination?
47
45 sec
Q.
Which of the following is NOT a correct name, symbol combination?
48
45 sec
Q.
Which of the following is NOT a correct name, symbol combination?
49
45 sec
Q.
The names of the elements whose symbols are Si, P, Mn, and S are respectively:
50
45 sec
Q.
Metals are located where on the periodic table?
51
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Q.
Nonmetals are located where on the periodic table?
52
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Q.
Metalloids are located where on the periodic table?
53
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Q.
Group 1A elements are also called:
54
45 sec
Q.
Group 7A elements are also called:
55
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Q.
Group 8A elements are also called:
56
45 sec
Q.
Group 2A elements are also called:
57
45 sec
Q.
Xe is a member of which family?
58
45 sec
Q.
Examine the elements listed below and identify the one element that is from a different periodic table group than the others.
59
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Q.
Cr is a member of which family?
60
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Q.
All of the following statements about different elements are true EXCEPT:
61
45 sec
Q.
Ions are formed when atoms:
62
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Q.
When an atom loses an electron, the resulting particle is called:
63
45 sec
Q.
When an atom gains an electron, the resulting particle is called:
64
45 sec
Q.
Which of the following statements about ions is INCORRECT?
65
45 sec
Q.
What is the correct formula for a potassium ion with 18 electrons?
66
45 sec
Q.
How many electrons are in Br-?
67
45 sec
Q.
How many protons and electrons are present in O2-?
68
45 sec
Q.
What is the charge on the barium ion?
69
45 sec
Q.
What is the charge on the ion formed by selenium?
70
45 sec
Q.
There is very little of the element astatine (symbol = At) on earth. If astatine formed an ion, it would most likely have the charge of:
71
45 sec
Q.
What is the charge on the ion formed by aluminum?
72
45 sec
Q.
What is the charge on the cesium ion?
73
45 sec
Q.
How many electrons would be in a -2 charged anion of sulfur? Sulfur has atomic number 16 in the periodic table.
74
45 sec
Q.
Isotopes are:
75
45 sec
Q.
The number of protons in the nucleus of an atom:
76
45 sec
Q.
The nucleus of an atom consists mainly of:
77
45 sec
Q.
How many neutrons are present in Ne-22?
78
45 sec
Q.
How many neutrons are present in C-14?
79
45 sec
Q.
What is the mass number of the hydrogen isotope that contains 2 neutrons?
