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Chapter 4 - Atomic Theory Flashcards | StudBud
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Chapter 4 - Atomic Theory
Chapter 4 - Atomic Theory
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Answers
1
Came up with the "Plum Pudding" Model of the Atom.
Dalton
Rutherford
Bohr
Thompson
2
Rutherford used this apparatus to investigate the structure of the atom:
Gamma Radiation
Gold Foil
Cathode Ray Tube
Oil Drop
3
Used the oil drop experiment to determine the mass of an electron.
Bohr
Millikan
Thompson
Rutherford
4
Which type of radiation is positively charged and massive?
beta
gamma
delta
alpha
5
The relative mass of a neutron (in amu)
2
-1
0
1
6
If the atomic mass is 23.4012, which isotope of Sodium is most common in nature?
Sodium-24
Sodium-22
Sodium-25
Sodium-23
7
What is the atomic mass of Uranium?
92
238.02891
238
235.34621
8
Developed quantum mechanics and gave us the current model of the atom with an electron cloud
Rutherford
Thompson
Schrodinger
Bohr
9
What is the atomic number of Uranium-238?
92
146
238
330
10
Which subatomic particle is neutral in charge?
proton
neutron
positron
electron
11
A neutral element's atomic number is equal to:
Number of electrons
Number of Neutrons
Number of Protons
Number of Protons + Neutrons
12
The number of
this particle
is unique to each element
positron
neutron
proton
electron
13
When atoms ________ they emit radiation.
warm
collide
decay
react
14
The Greek philosopher that named the atom.
Dalton
Aristotle
Democritus
Plato
15
An ion is when you change
this particle
positron
proton
electron
neutron
16
True or False: We have no way of seeing individual atoms.
True
False
17
Which subatomic particle is positively charged?
proton
neutron
beta radiation
electron
18
Discovered the nucleus and the proton
Chadwick
Thompson
Rutherford
Millikan
19
What is the mass number of Uranium-238?
92
238
146
330
20
Based on our current understanding, most of the mass of an atom is
Evenly distributed throughout the atom
In Spikes radiating from the nucleus (like a star)
in the Nucleus
in the Electron cloud
21
What is conserved in nuclear reactions?
charge
mass
all of these
energy
22
The relative mass of a proton (in amu)
1
2
-1
0
23
An isotope is when you change
this particle
electron
proton
neutron
positron
24
The various isotopes of Carbon will have the same _______ but different _______.
electrons / charges
protons / charges
protons / masses
neutrons / masses
25
Which is NOT an aspect of Dalton's Atomic Theory?
Atoms of an element are identical
Each element composed of atoms
Empty space does not exist
Atoms of one element can’t change into another element
26
Discovered the neutron
Rutherford
Chadwick
Thompson
Bohr
27
The relative mass of an electron (in amu)
2
1
0
-1
28
In the gold foil experiment, most alpha particles:
Bounce back
Stop at the foil
Pass straight through
Deflect at wide angles
29
Which of the following is not a type of radiation?
beta
delta
gamma
alpha
30
Came up with the "Nuclear Model" of the atom
Rutherford
Bohr
Schrodinger
Dalton
31
Thompson used this device to investigate the structure of atoms
Gold foil
Cathode Ray Tube
Oil Drop Apparatus
Alpha particles
32
Developed the model of the atom that has energy levels
Thompson
Rutherford
Bohr
Schrodinger
33
Which type of radiation is neutrally charged and has no mass?
delta
beta
alpha
gamma
34
What is the number of neutrons in Uranium-238?
330
92
238
146
35
Discovered the electron
Thompson
Rutherford
Chadwick
Schrodinger
36
The amu is defined as 1/12 the mass of
Carbon-12
A Helium nucleus
Carbon-14
Nitrogen-12
37
An element's mass number is equal to:
Number of Protons
Number of Neutrons
Number of electrons
Number of Protons + Neutrons
38
Which type of radiation is negatively charged and light?
alpha
delta
beta
gamma
39
Which subatomic particle is negatively charged?
neutron
proton
electron
positron
40
The Scientist that rediscovered atomic theory.
Thompson
Rutherford
Democritus
Dalton
