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Atomic Theory Chapter 3 Review Flashcards | StudBud
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Atomic Theory Chapter 3 Review
Atomic Theory Chapter 3 Review
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1
How many subatomic particles are
in the nucleus
of the following isotope?
120
36
84
48
2
An atom has 10 protons, 10 electrons, and 12 neutrons. What element is it?
Na
Mg
Ti
Ne
3
How many neutrons are in the following atom?
7
3
10
4
4
Who discovered the nucleus?
JJ Thomson
John Dalton
James Chadwick
Ernest Rutherford
5
Who discovered the electron?
Eugene Goldstein
Ernest Rutherford
JJ Thomson
John Dalton
6
An atom has 13 protons and 14 neutrons. How many electrons does it have?
27
1
13
14
7
Hydrogen - 1 and Hydrogen - 2 are examples of what?
none of the above
isotopes
ions
neutrons
8
Who proposed the nuclear model of the atom?
Ernest Rutherford
Democritus
John Dalton
JJ Thomson
9
Most of the mass of an atom is concentrated in the nucleus.
FALSE
TRUE
10
The number of protons in an atom is defined as the:
atomic number
isotope
mass number
atomic mass
11
The model of the atom shown in this picture is called:
plum pudding model
planetary model
electron cloud model
nuclear model
12
Dalton's atomic theory helped explain the law of conservation of mass because it stated:
atoms all had the same mass
atoms could not be created or destroyed
atoms could not combine
atoms could be subdivided
13
Who described the atom as "indivisble and indestructable?"
JJ Thomson only
Dalton and Democritus
Dalton and Thomson
Democritus only
14
All parts of Dalton's atomic theory are still true today.
FALSE
TRUE
15
Who performed the gold foil experiment?
John Dalton
Ernest Rutherford
Niels Bohr
JJ Thomson
16
An atom has an atomic number of 5 and mass number of 11. How many neutrons does it have?
6
5
none of the above
11
17
Who proposed the plum pudding model of the atom?
JJ Thomson
Robert Millikan
Ernest Rutherford
John Dalton
18
The first scientist to propose an atomic theory based on experimental evidence was:
Democritus
Rutherford
Dalton
Thomson
19
Atoms of the same element can have different mass numbers.
TRUE
FALSE
20
An atom has 10 protons, 10 electrons, and 12 neutrons. What is its atomic number?
12
22
10
2
21
Protons and electrons have the same relative mass.
FALSE
TRUE
22
An atomic mass unit (amu) is one-twelfth the mass of a carbon-12 atom.
TRUE
FALSE
23
Subatomics particles that have no charge:
neutrons
protons
ions
electrons
24
Who discovered the neutron?
John Dalton
JJ Thomson
Ernest Rutherford
James Chadwick
25
Atoms are mostly empty space.
FALSE
TRUE
26
Subatomic particles that have a positive charge.
protons
neutrons
ions
electrons
27
The gold foil experiment led to the discovery of the:
nucleus
electron
proton
neutron
28
Subatomic particles found in the nucleus of an atom:
neutrons and electrons
protons and electrons
protons, neutrons, and electrons
protons and neutrons
29
Subatomic particles that have a negative charge:
ions
protons
electrons
neutrons
30
Atoms of carbon always have 6 protons.
FALSE
TRUE
31
Who discovered the proton?
JJ Thomson
Robert Millikan
Eugene Goldstein
Ernest Rutherford
32
In the atom "nitrogen - 15," what does the "15" represent?
atomic number
atomic mass
mass number
atom
33
Atoms that have the same number of protons but different number of neutrons are called:
ions
nucleus
non-existent
isotopes
34
How many electrons are in the following atom?
35
17
18
52
35
The Greek philosopher to first propose the idea of atoms:
Galileo
Dalton
Democritus
Plato
36
Mass number is defined as the number of ____________ in an atom.
protons and neutrons
protons
protons and electrons
neutrons
37
An atom has 4 protons, 4 electrons, and 5 neutrons. What is its mass number?
9
4
8
5
