stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Chapter 3: The Atom Flashcards | StudBud
Explore
/
Chapter 3: The Atom
Chapter 3: The Atom
36 terms
·
StudBud Administration
·
1,549 plays
Physical Science (6th ed) BJU
Flashcards
36 cards
F
Practice quiz
P
Host live
L
Questions
36
Answers
1
The unique number of protons in the atoms of an element is that element’s _________
isotope
charge
atomic mass
atomic number
2
Carbon-14 is different from carbon-12 in that it has a different number of __________.
protons
all of these
electrons
neutrons
3
The Bohr model suggests that electrons move
only in distinct, spherical orbits at fixed distances from the nucleus.
in a flat ring around a massive, positively charged center.
randomly about the nucleus.
rapidly throughout a uniform, positively charged matrix.
4
What does the 2− indicate in the oxygen ion O
2−
?
This oxygen has gained two electrons
This oxygen has lost two electrons
5
Which of the following is a weighted average?
mass number
atomic number
atomic mass
None of these
6
Give the number of protons for the neutral copper isotope below
36
65
29
7
What is the currently accepted model of the atom?
the Saturnian model
the subatomic model
the plum pudding model
the quantum-mechanical model
8
One isotope of phosphorus has fifteen protons and eighteen neutrons. What is the name of this isotope?
phosphorus-33
phosphorus-15
phosphorus-18
9
Experiments involving __________ led to the discovery of the nucleus.
the emission spectrum
the chemical reactions of gases
Crookes tubes and cathode rays
alpha particles and gold foil
10
Who first proved that atoms were divisible when he saw evidence of charged particles existing in the atom?
J. Dalton
Niels Bohr
Ernest Rutherford
J. J. Thomson
11
developed the plum pudding model
Ernest Rutherford
Niels Bohr
Hantaro Nagaoka
J J Thompson
12
Which of the following is not a way that an ion can be formed?
All the these lead to ion formation.
An atom can lose a neutron.
An atom can lose electrons.
An atom can gain extra electrons.
13
Which of the following accurately describes a cation? Select all that apply.
It is negatively charged.
It has more electrons than protons.
It has more protons than electrons.
It is positively charged.
14
An ion that has more protons than electrons is called a(n)
charge
isotope
cation
anion
15
discovered electrons using Crookes tubes
John Dalton
Democritus
Ernest Rutherford
J. J. Thomson
16
Give the number of electrons for the neutral copper isotope below
65
36
29
17
believed that electrons move through spherical regions located a fixed distance from the nucleus
Ernest Rutherford
Hantaro Nagaoka
Niels Bohr
John Dalton
18
developed the nuclear model
J. J. Thomson
Democritus
Ernest Rutherford
John Dalton
19
Atoms of the same element with differing numbers of neutrons are called
isotopes
anions
sister elements
cations
20
Potassium-39 and potassium-41 always have the same number of __________.
all of these
protons
electrons
neutrons
21
What is J. J. Thomson’s atomic model called?
the nuclear model
the Saturnian model
the quantum-mechanical model
the plum pudding model
22
first suggested that elements are made of atoms and that the atoms of an element are all alike
Democritus
Ernest Rutherford
John Dalton
J. J. Thomson
23
Copper-63 and copper-65 can never have the same number of __________.
all of these
electrons
protons
neutrons
24
Which of the following represents a sodium atom that has lost an electron?
Na+
S-
Na–
S+
25
J. J. Thomson discovered the existence of the __________.
neutron
atom
electron
proton
26
In Rutherford’s experiments, a beam of __________ was directed at a piece of gold foil.
electrons
atoms
corpuscles
alpha particles
27
An anion has more __________ than __________.
electrons; neutrons
electrons; protons
neutrons; protons
protons; electrons
28
developed the Saturnian model
Hantaro Nagaoka
John Dalton
Ernest Rutherford
Niels Bohr
29
Why is the Bohr model still in widespread use today? Select all that apply.
It is correct in its depiction of atomic structure.
It is fairly simple and easy to understand.
It represents energy levels in a way that is easier to visualize
It is the most workable model to date.
30
Give the number of neutrons for the neutral copper isotope below
29
36
65
31
According to research with Crookes tubes, which of the following scientists suggested that cathode rays were negative?
Niels Bohr
J. Dalton
J. J. Thomson
Ernest Rutherford
32
Rutherford’s gold foil experiments gave rise to which atomic model?
the Saturnian model
the nuclear model
the plum pudding model
the quantum-mechanical model
33
The law of electrostatic charges states that
opposite electric charges attract each other.
neither
like electric charges repel each other.
both
34
The earliest record of a particle theory of matter is from the __________.
Greeks
English
Japanese
Romans
35
Democritus suggested that matter
existed in the form of very small, indivisible particles.
was continuous.
could be subdivided an unlimited number of times.
was made of hard spherical atoms surrounded by heat envelopes.
36
thought of indivisible "atomos"
J. J. Thomson
Democritus
John Dalton
Ernest Rutherford
