stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Early Atomic Theory Review Flashcards | StudBud
Explore
/
Early Atomic Theory Review
Early Atomic Theory Review
35 terms
·
StudBud Administration
·
586 plays
Non-quantum Atomic theory from Democritus to Chadwick with average atomic mass and moles questions.
Flashcards
35 cards
F
Practice quiz
P
Host live
L
Questions
35
Answers
1
Which subatomic particles have masses around 1 atomic mass unit?
Quarks
Electrons
Neutrons
Protons
2
Table salt is always 60.66% chlorine and 39.34% sodium. This is an example of which law?
Universal Gas Law
Law of Conservation of Mass
Law of Multiple Proportions
Law of Definite Proportions
3
The mass number of an isotope tells
its mass
the number of neutrons it has
the total particles in its nucleus
the number of protons it has
4
The mass of reactants always equals the mass of products. What law is this?
Law of Conservation of Mass
Universal Gas Law
Law of Definite Composition
Law of Multiple Proportions
5
Who discovered that the mass of reactants always equals the mass of products?
Thomson
Dalton
Lavoisier
Rutherford
6
Grams of a substance can be changed into numbers of atoms using
Avogadro;s number then molar mass.
molar mass conversion factor.
Avogadro's number conversion factor.
molar mass then Avogadro's number.
7
J J Thomson used cathode rays to discover
the nucleus.
protons.
neutrons.
electrons.
8
The average atomic mass of an element in grams equals
the mass of one mole of the element.
the mass of one atom of the element.
9
The atomic number of an atom is
the number of protons in the nucleus
the number of neutrons in the nucleus
the number of particles in the nucleus
10
Who discovered the nucleus?
J J Thomson
Ernest Rutherford
Albert Einstein
James Chadwick
11
Moles of a substance can be changed into grams using
molar mass conversion factor.
Avogadros' number conversion factor.
12
What force holds the nucleus together?
The electromagnetic force
Gravity
The strong nuclear force
The weak nuclear force
13
CO and CO
2
are compounds that illustrate which law?
The Law of Conservation of Mass
The Law of Multiple Proportions
The Law of Definite Proportions
Dalton's Law
14
Isotopes are atoms of the same element with different
numbers of electrons.
numbers of neutrons.
numbers of protons.
masses.
15
Uranium-235 has 92 protons and 143 neutrons. Its mass number is
143
235
92
16
Measuring the percent abundance and the masses of isotopes of an element is
mass spectrometry.
chromatography.
combustion analysis.
mass analysis.
17
Neutrons have what charge?
Positive
Negative
Neutral
18
Calculating average atomic mass uses what two things?
isotope mass and natural abundance
atomic number and mass number
charge and mass of isotopes
moles and Avogadro's number
19
The average atomic mass of an element in atomic mass units (amu) equals
the mass of one mole of the element.
the mass of one atom of the element.
20
How did Dalton reflect the Law of Conservation of Mass in his atomic theory?
Atoms are rearranged in chemical reactions.
All atoms of one element are identical.
Atoms combine in whole number ratios.
Atoms cannot be created or destroyed.
21
1/12 the mass of one atom of carbon-12 is
1 mole
1 Dalton
1 nuclear unit
1 atomic mass unit
22
Which of Dalton's ideas has been changed from his original atomic theory?
All atoms of one element are identical.
Atoms are rearranged in chemical reactions.
Atoms of each element are different .
All matter is made of atoms.
23
The nucleus was discovered in which experiment?
The Plum Pudding Experiment
The Oil Drop Experiment
Cathode Ray Experiments
The Gold Foil Experiment
24
Which questions did the discovery of the nucleus produce?
Why do atoms have mass?
Which particles have a positive charge?
Why do electrons stay out of the nucleus?
What holds the nucleus together?
25
Deuterium has mass number
2
3
4
1
26
The nucleus
is not very dense.
fills most of the atom.
has no charge.
is very, very small compared to the whole atom.
27
Which other idea of Dalton's has been changed?
Atoms cannot be subdivided.
Atoms combine in small whole-number ratios.
All matter is made of atoms.
Atoms of each element are different.
28
Electrons have what charge?
Neutral
Negative
Positive
29
All elements have only one isotope.
True
False
30
Protons have what charge?
Neutral
Negative
Positive
31
John Dalton pictured atoms as
a nucleus surrounded by an electron cloud
solid spheres of matter
a plum pudding
a solar system
32
Moles of a substance can be changed into numbers of atoms using
Avogadro's number conversion factor.
molar mass conversion factor.
33
Which item was NOT part of John Dalton's original atomic theory of matter?
All matter is made of atoms.
Atoms are rearranged in chemical reactions.
All atoms have the same properties.
Atoms cannot be created or destroyed
34
Lithium has two isotopes, Li-6 and Li-7. Which is more abundant?
They are equally abundant.
Li-7
It is impossible to tell.
Li-6
35
John Dalton thought that atoms
have no mass
cannot be created or destroyed
contain molecules
are composed of smaller pieces
