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Physical Science Module 3 Flashcards | StudBud
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Physical Science Module 3
Physical Science Module 3
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BJU Press/Cover the chapter "The Atom"
Flashcards
49 cards
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Practice quiz
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Questions
49
Answers
1
Most of an atom contains empty space.
True
False
2
This term refers to different versions of the same atom.
isosceles
ion
isomer
isotope
3
What model is below?
plum pudding model
Bohr model
spherical model
nuclear model
4
There have been many revisions to the atomic model throughout history.
False
True
5
An ion that has more electrons that protons is a
anion
cation
6
What is J.J. Thomson's atomic model called?
the plum pudding model
the quantum-mechanical model
the Saturnian model
a nuclear model
7
The Bohr model suggests that electrons move
in a flat ring around a massive, positively charged center.
randomly around the nucleus
rapidly throughout a uniform, positively charged matrix
only in distinct, spherical orbitals at fixed distances from the nucleus.
8
What model is below?
Bohr model
nuclear model
saturnian model
plum pudding model
9
Opositte charges repel and like charges attract. This is the law of electrostatic charges.
False
True
10
This scientist believed that elements are made up of atoms and those atoms are exactly alike.
Ernest Rutherford
J.J. Thomson
John Dalton
Democritus
11
Carbon-14 is different from Carbon-12 in that it has a different number of ________.
neutrons
protons
all of the above
electrons
12
John Dalton's atomic theory has had to be revised to fit modern day knowledge.
True
False
13
If a potassium atom loses an electron, it will become a cation.
False
True
14
Which of the following is a
weighted
average?
atomic mass
mass number
atomic number
none of the above
15
Aristotle first called particles atomos, from which we get the word atoms.
True
False
16
The Bohr model is still used today because it is simple and easy to understand, not b/c it is correct.
False
True
17
The plum pudding model had electrons and protons scattered like chocolate chips in a cookie.
False
True
18
What is the correct order of subatomic particles from largest to smallest?
electrons>neutrons>protons
electrons>protons>neutrons
neutrons>electrons>protons
neutrons>protons>electrons
19
What did J.J. Thomson discover?
cathode rays
electron
protons
alpha particles
20
It is possible that our current atomic model will be revised in the future.
False
True
21
Who discovered cathode rays by using a cathode ray tube?
J.J. Thomson
Ernest Rutherford
William Crookes
James Chadwick
22
The _______ is about 1836 times the mass of an electron, but the slighltly more massive _______ is 1838 times its mass.
anion; cation
proton; neutron
cation; anion
neutrons; protons
23
Since Carbon-14 is radioactive, we can use it in radiocrabon dating.
True
False
24
The isotopic notation below tells us that we have 42 neutrons.
False
True
25
If the atom is neutral, how many electrons does it have?
78
114
36
42
26
Isotopes of the same elements
always
have the same number of what?
all of the above
neutrons
electrons
protons
27
Alpha particles have a positive charge.
False
True
28
How many neutrons does rubidium-85 have? Its symbol is Rb.
48
25
85.2467
37
29
If carbon-14 loses 2 neutrons, it would become
carbon-12
oxygen-16
Beryllium-10
none of the above
30
When an atom gains or loses a neutron, it becomes an ion.
False
True
31
Who had the more correct early theory on matter?
Aristotle
Democritus
32
The picture below is an example of
isotope-name
isotopic notation
33
We now have expensive microscopes that can clearly see different atoms.
True
False
34
Isotopes of silicon are silicon-28,-29, & -30. Its atomic mass is 28.085u. Which is the most common?
silicon-30
silicon 2+
silicon-28
silicon-29
35
What model is below?
quantum mechanical model
nuclear model
Bohr model
saturnian model
36
What model is below?
nuclear model
Bohr model
saturnian model
plum pudding model
37
The amount of this subatomic particle in an atom actually determines the identity of the atom.
protons
electrons
nucleus
neutrons
38
John Dalton proposed that atoms are hard spheres of different sizes and masses.
True
False
39
The nucleus of an atom will form a bond with a nucleus of another atom to form a compound.
False
True
40
Democritus suggested that matter could be subdivided an unlimited number of times.
True
False
41
Scientists currently hold to the quantum-mechanical model b/c it is able to precisely pinpoint electron locations.
False
True
42
If Nitrogen were to lose one proton, the result would be
a positively charged nitrogen ion
a carbon atom
a negatively charged nitrogen ion
an oxygen atom
43
How many protons does the isotope below have?
78
114
36
42
44
What did NOT lead Rutherford to believe that most of the atom's mass & +charges were densely packed into a small space?
Most alpha particles passed through the foil unaffected.
Some alpha particles were deflected at varying angles after passing foil.
some alpha particles emitted photons as they lost energy.
some alpha particles bounced off at sharp angles
45
A cathode ray tube is also called a Crooke's tube.
True
False
46
Radiocarbon dating is accurate up to 100,000 years.
False
True
47
Quantum mechanical orbitals are oddly shaped compared to the more distinct orbits of the Bohr model.
False
True
48
Orbitals are found in the Bohr model, and orbits are found in the quantum-mechanical model.
True
False
49
Cathode rays are positively charged.
False
True
