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Atomic Theory Review Flashcards | StudBud
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Atomic Theory Review
Atomic Theory Review
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Flashcards
30 cards
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Questions
30
Answers
1
Who is given credit for discovering the neutron?
James Chadwick
JJ Thomson
Robert Millikan
Ernest Rutherford
2
The average atomic mass of an element is defined as the weighted average mass of that element's
most abundant isotope
naturally occurring isotopes
least abundant isotope
radioactive isotopes
3
All isotopes of neutral atoms of sodium have
11 protons and 12 neutrons
12 protons and 11 neutrons
11 protons and 11 electrons
12 protons and 12 electrons
4
Which of the following particles has the smallest mass?
neutron
electron
hydrogen atom
proton
5
Most elements are
metals
gases
nonmetals
made in a laboratory
6
Compared with an electron, a proton has
equal mass and an opposite charge
more mass and an opposite charge
more mass and the same charge
equal mass and the same charge
7
Who is given credit for discovering the electron?
James Chadwick
Robert Millikan
JJ Thomson
Ernest Rutherford
8
There are three isotopes of oxygen: O-16, O-17, and O-18. These neutral atoms contain
equal numbers of p+, n0, and e-
equal numbers of p+ and n0, but different numbers of e-
equal numbers of p+ and e-, but different numbers of n0
different numbers of p+, n0, and e-
9
The total number of neutrons in the nuclide Cl-35 is
52
17
35
18
10
In Rutherford's gold foil experiment, the results of experiment were that
few of the particles were repelled, showing a neutral core
most of the particles were repelled, showing a negative core
most of the particles failed to pass through the foil
few of the particles were repelled, showing a positive core
11
What is the name of the nuclide H-2?
protium
deuterium
tritium
hydrogen atom
12
What is the nuclear charge of an atom with a mass of 23 and an atomic number of 11?
+11
+12
+23
+34
13
Who is given credit for discovering the mass and charge of an electron?
James Chadwick
Ernest Rutherford
JJ Thomson
Robert Millikan
14
The model of the atom that first pictured the nucleus is called the
planetary model
plum pudding model
nuclear model
cannonball model
15
Compared to the charge and mass of a proton, an electron has
an opposite charge and a smaller mass
the same charge and the same mass
an opposite charge and the same mass
the same charge and a smaller mass
16
A nucleus contains 3 p
+
and 4 n
0
. What element does it represent?
lithium
helium
beryllium
hydrogen
17
The major portion of an atom's mass consists of
electrons and neutrons
electrons and protons
neutrons and positrons
neutrons and protons
18
Neutral atoms must contain equal numbers of
protons and electrons
protons, neutrons, and electrons
protons and neutrons
neutrons and electrons
19
What is the charge on a particle that contains 9 protons, 10 neutrons, and 9 electrons?
It has a net charge of +28
It is neutral
It has a net charge of -1
It has a net charge of +1
20
Who is given credit for discovering the nucleus?
Ernest Rutherford
JJ Thomson
Robert Millikan
James Chadwick
21
The nuclides C-14 and N-14 are similar in that they both have the same
nuclear charge
mass number
atomic number
number of neutrons
22
Which atoms have the same number of neutrons?
H-3 and He-4
H-2 and He-4
H-1 and He-3
H-3 and He-3
23
The last subatomic particle discovered was the
proton
gluon
electron
neutron
24
Dalton's atomic theory states that
matter is made up of earth, fire, air, and water
all atoms in a compound are identical
all atoms of a given element must be identical
matter is not conserved in chemical reactions
25
Compared to the entire atom, the nucleus of the atom is
large and contains most of the atom's mass
smaller and contains most of the atom's mass
large and contains little of the atom's mass
smaller and contains little of the atom's mass
26
The model of the atom that pictured the atom with electrons traveling in circular orbits is the
modern electron cloud model
cannonball model
planetary model
nuclear model
27
Find the number of neutrons in an atom of
79
34
Se.
79
45
113
34
28
There are three isotopes of hydrogen, H-1, H-2, and H-3. All of these isotopes have
an atomic number of 1
1, 2, or 3 protons
a mass of 2 amu
1, 2, or 3 neutrons
29
The concept that matter is composed of tiny, discrete particles is generally attributed to
Romans
Germans
Greeks
Koreans
30
A neutron has approximately the same mass as
a proton
a beta particle
an alpha particle
an electron
