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Physical Science Chapter 3: The Atom Flashcards | StudBud
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Physical Science Chapter 3: The Atom
Physical Science Chapter 3: The Atom
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1
Democritus thought of the indivisible " atomos"
True
False
2
Current atomic models show that electrons travel in distinct , spherical orbits around the nucleus.
True
False
3
Aristotle first called particles atomos, from which we get our word atom.
False
True
4
With which of these statements would John Dalton have disagreed?
elements are made only of atoms
atoms cannot be created or destroyed in chemical reactions
atoms of a element are all alike
atoms can de divided into protons, neutrons and electrons
5
This subatomic particle is found in the nucleous and has no electrical charge
electron
proton
neutron
6
This Subatomic particle has a charge of -1e
electron
neutron
proton
7
_____________ developed the nuclear model
none of the above
Hantaro Nagaoka
democritus
Ernest Rutherford
8
John Dalton thought that atoms are indivisible and cannot be destroyed.
False
True
9
Experiments involving ___________ lead to the discovery of the nucleus.
alpha particles and gold foil
crooks tube
chemical reactions of gases
emission spectrum
10
Ernetst Rutherford developed the Saturnian Model
False
True
11
____________ discovered electrons using Crookes tubes
John Dalton
Ernest Rutherford
JJ Thompson
Niels Bohr
12
the total number of particles found in the nucleus of a given element
atomic number
mass number
atomic mass
unified atomc mass unit
13
Which of the following is NOT typically represented with whole number?
atomic number
mass number
atomic mass
all of the choices are whole numbers
14
Potassium -39 and potassium -41 always have the same number of ___________.
all of the above
electrons
neutrons
protons
15
_______________ first suggested that elements are made of atoms and that atoms of an element are alike
john dalton
niels bohr
democritus
ernest rutherford
16
Which of the following is a weighted average?
none of these
atomic number
mass number
atomic mass
17
The law of electrostatic charges states that
like electric charges repel each other
both a & b are true
opposite electric charges attract each other
neither a nor b are true
18
Democritus suggested that matter
existed in the form of very small, indivisible particles
could be subdivided an unlimited number of times
was continuous
was made of hard spherical atoms surrounded by heat envelopes
19
What is the currently accepted model of the atom?
the quantum mechanical model
the Bohr Model
the nuclear model
the subatomic model
20
Most of an atom consits of filled space
False
True
21
The number of protons found in the nucleus of a given element.
unified atomic mass unit
mass number
atomic number
atomic mass
22
An anion has more ____________ than ______
electrons, neutrons
neutrons, protons
protons, electrons
electrons, protons
23
What is JJ Thomson's atomic model called?
the nuclear model
the quantum mechanical model
the plum pudding model
the saturanian model
24
Quantum mechanics is a branch of physics that deals with __________.
classical physics
gravitational force
matter and energy at atomic and subatomic levels
laws fo motion
25
The subatomic particel has a charge of +1e
proton
electron
neutron
26
The quantum mechanical model is not the primary model used today by scientists.
True
False
27
Carbon -14 and Carbon -12 have differnt numbers of neutrons.
True
False
28
Which of the following is NOT a reason that the Bohr model is still in widespread use today?
it is simple and easy to understand
its the most workable model to date
its useful for showing how chemical bonding works
it represnets energy levels in a visual way
29
Quantum Mechanics deals with the behavior of matter and energy at the atomic and subatomic levels.
False
True
30
JJ Thomson discovered the existence of the _____________.
proton
electron
neutron
atom
31
___________believed that electrons move through spherical regions located a fixed distance from the nucleus.
JJ Thompson
Ernest Rutherford
Democritus
Niels Bohr
32
Hantaro Nagaoka developed the plum puddign model
True
False
33
The Bohr Model suggests that electrons move
only in distinct, spherical orbits at fixed distances from the nucleus
randomly about the nucleus
rapidly trhoughout a uniform, positively charged matrix
in a flat ring around a massive, positively charged center
