CHEM 130 Exam 1 Study Guide
Questions with Guaranteed Pass
Solutions 2025-2026 Updated.
CHAPTER 1 - Answer
Atoms - Answer Sub-microscopic particles; fundamental building blocks of matter
Molecules - Answer atoms bound together in specific geometrical arrangements
Chemistry - Answer science that seeks to understand behavior of matter by studying
behavior of atoms and molecules
Hypothesis - Answer an explanation of observations
Experiments - Answer procedures designed to generate observations that confirm or refute
a hypothesis
Scientific law - Answer statement that summarizes past observations and predicts future one
Scientific theory - Answer a model for the way nature is and tries to explain not only what
but also why
Dalton's Atomic Theory - Answer matter is composed of small, indestructible particles called
atoms
Matter - Answer anything that occupies space and has mass
Substance - Answer specific instance of matter
State - Answer physical form of matter
3 types: solid, liquid, gas
, Crystalline - Answer type of solid matter where atoms or molecules are in patterns with long
range order
Amorphous - Answer type of solid matter where atoms or molecules do not have a long-
range order
Pure substance - Answer substance made up of only one component; composition does not
vary from sample to sample
categorize into 2 groups: elements or compounds
Element - Answer substance that cannot be broken down into simpler substances
Compound - Answer a substance composed of two or more elements
more common than pure elements
Mixture - Answer substance made up of two or more components
Categorized into 2 groups: Heterogeneous and homogeneous
Heterogeneous mixture - Answer the composition of the mixture varies from one region of
the mixture to another
Homogeneous mixture - Answer the composition of the mixture is same throughout
Physical change - Answer changes that only alter the appearance or state
Chemical change - Answer changes that alter the composition of matter
Physical property - Answer property that a substance displays without changing its
composition
Ex: odor, taste, color, appearance, melting/boiling point, density, change in state of matter or
changes in physical condition of matter
Chemical property - Answer property that a substance displays by changing its composition
Questions with Guaranteed Pass
Solutions 2025-2026 Updated.
CHAPTER 1 - Answer
Atoms - Answer Sub-microscopic particles; fundamental building blocks of matter
Molecules - Answer atoms bound together in specific geometrical arrangements
Chemistry - Answer science that seeks to understand behavior of matter by studying
behavior of atoms and molecules
Hypothesis - Answer an explanation of observations
Experiments - Answer procedures designed to generate observations that confirm or refute
a hypothesis
Scientific law - Answer statement that summarizes past observations and predicts future one
Scientific theory - Answer a model for the way nature is and tries to explain not only what
but also why
Dalton's Atomic Theory - Answer matter is composed of small, indestructible particles called
atoms
Matter - Answer anything that occupies space and has mass
Substance - Answer specific instance of matter
State - Answer physical form of matter
3 types: solid, liquid, gas
, Crystalline - Answer type of solid matter where atoms or molecules are in patterns with long
range order
Amorphous - Answer type of solid matter where atoms or molecules do not have a long-
range order
Pure substance - Answer substance made up of only one component; composition does not
vary from sample to sample
categorize into 2 groups: elements or compounds
Element - Answer substance that cannot be broken down into simpler substances
Compound - Answer a substance composed of two or more elements
more common than pure elements
Mixture - Answer substance made up of two or more components
Categorized into 2 groups: Heterogeneous and homogeneous
Heterogeneous mixture - Answer the composition of the mixture varies from one region of
the mixture to another
Homogeneous mixture - Answer the composition of the mixture is same throughout
Physical change - Answer changes that only alter the appearance or state
Chemical change - Answer changes that alter the composition of matter
Physical property - Answer property that a substance displays without changing its
composition
Ex: odor, taste, color, appearance, melting/boiling point, density, change in state of matter or
changes in physical condition of matter
Chemical property - Answer property that a substance displays by changing its composition
