A theory is best described as a

generalization that explains known facts or phenomena.

The average atomic mass of an element

may not equal the mass of any of its isotopes.

The radius of an atom extends to the outer edge of the

region occupied by the electrons.

A chemical can be defined as

any substance that has a definite composition.

The density of an object is calculated by

dividing its mass by its volume.

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Chemistry Final 2017 Part 1

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Chemistry Final Vocabulary Review

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Questions 20

Answers

1
A measure of the quantity of matter is
density.
mass.
volume.
weight.
2
A measurement that closely agrees with an accepted value is best described as
significant.
precise.
reproducible.
accurate.
3
Isotopes are atoms of the same element that have different
numbers of electrons.
numbers of protons.
principal chemical properties.
masses.
4
Dalton incorporated the law of conservation of mass into his atomic theory by asserting that
atoms of different elements have different properties.
atoms are indivisible.
matter is composed of atoms.
atoms can be destroyed in chemical reactions.
5
Two variables are directly proportional if their ____ has a constant value.
product
quotient
sum
difference
6
A theory is best described as a
generalization that explains known facts or phenomena.
series of experimental observations.
scientifically proven fact.
testable statement.
7
The average atomic mass of an element
may not equal the mass of any of its isotopes.
is the mass of the most abundant isotope.
cannot be calculated.
always adds up to 100.
8
A nonmetal is usually
brittle.
a good conductor.
malleable.
used to make jewelry.
9
A plausible explanation of a body of observed natural phenomena is a scientific
experiment.
law.
theory.
control.
10
Which of these is the abbreviation for the SI base unit of time?
sec
h
s
hr
11
The atomic mass of an element listed in the periodic table is the
average atomic mass.
relative atomic mass of most abundant radioactive isotope.
relative atomic mass of the most abundant isotope.
mass number of the least abundant isotope.
12
All atoms of the same element have the same
mass number.
atomic number.
number of neutrons.
atomic mass.
13
The radius of an atom extends to the outer edge of the
positive charges.
nucleus.
region occupied by the neutrons.
region occupied by the electrons.
14
Atoms of the same element can differ in
chemical properties.
atomic number.
number of protons and electrons.
mass number.
15
Inorganic chemistry is the study of
mathematical modeling.
non-carbon related compounds.
the chemistry of living things.
the identification of the composition of materials.
16
A statement that can be tested experimentally is a
variable.
hypothesis.
model.
generalization.
17
A chemical can be defined as
an unnatural additive placed in food.
any substance that is not alive.
any substance that has a definite composition.
a toxic substance.
18
The number of atoms in a mole of any pure substance is called
Avogadro's constant.
its gram-atomic number.
its mass number.
its atomic number.
19
The density of an object is calculated by
dividing its volume by its mass.
adding its mass to its volume.
dividing its mass by its volume.
multiplying its mass times its volume.
20
The average atomic mass of an element is the average of the atomic masses of its
radioactive isotopes.
artificial isotopes.
two most abundant isotopes.
naturally occurring isotopes.

Chemistry Final 2017 Part 1 Flashcards | StudBud