Chem 103 Exam 1 (UNLV) Questions
With Correct Answers 2026
What is chemistry? - CORRECT ANSWER -The study of composition, structure, properties, and
reactions of matter.
What is matter? - CORRECT ANSWER -All the substances that make up our world
What are the 3 physical states of matter? - CORRECT ANSWER -Solid, Liquid, and Gas
What is a solid? - CORRECT ANSWER -Has definite shape and volume
What is a liquid? - CORRECT ANSWER -Has definite volume but NO shape
What is a gas? - CORRECT ANSWER -Has NO definite volume OR shape
What are physical properties? - CORRECT ANSWER -Has characteristics that can be observed OR
measured without affecting the identity of a substance.
What are chemical properties? - CORRECT ANSWER -Are those that describe the ability of a
substance to change into a new substance.
Examples of physical properties - CORRECT ANSWER -Shape, Color, melting point, and physical
state.
A penny that is round shaped, an orange-red color, a solid and a shiny luster. Are these physical
or chemical properties? - CORRECT ANSWER -Physical
, What is a physical change? - CORRECT ANSWER -Its state or its appearance will change but its
composite remains the same.
Particle move in random directions but are sufficiently attracted to each other to maintain a
definite volume, although not a rigid structure. - CORRECT ANSWER -Liquid
Water as a _____takes the ______ of its container. - CORRECT ANSWER -Liquid; Shape
Strong attractive forces hold particles such as atoms or molecules close together. The particles
are arranged in such a rigid pattern that only vibrate slowly in fixed position. - CORRECT
ANSWER -Solid
What is a chemical change? - CORRECT ANSWER -When an original substance is converted into
1 or more NEW substances, which has different chemical & physical properties.
Particles are far apart, have little attraction to each other and move at high speeds, taking shape
and volume of its container. - CORRECT ANSWER -Gas
What is an atom? - CORRECT ANSWER -Basic unit of matter that consists of a dense central
nucleus surrounded by a cloud of negatively charged electrons.
Water boiling is what kind of physical state? - CORRECT ANSWER -Change of state
Freezing from liquid water to Ice is what kind of physical state? - CORRECT ANSWER -Change of
state
Dissolving sugar in water is what kind of physical state? - CORRECT ANSWER -Change of
appearance
With Correct Answers 2026
What is chemistry? - CORRECT ANSWER -The study of composition, structure, properties, and
reactions of matter.
What is matter? - CORRECT ANSWER -All the substances that make up our world
What are the 3 physical states of matter? - CORRECT ANSWER -Solid, Liquid, and Gas
What is a solid? - CORRECT ANSWER -Has definite shape and volume
What is a liquid? - CORRECT ANSWER -Has definite volume but NO shape
What is a gas? - CORRECT ANSWER -Has NO definite volume OR shape
What are physical properties? - CORRECT ANSWER -Has characteristics that can be observed OR
measured without affecting the identity of a substance.
What are chemical properties? - CORRECT ANSWER -Are those that describe the ability of a
substance to change into a new substance.
Examples of physical properties - CORRECT ANSWER -Shape, Color, melting point, and physical
state.
A penny that is round shaped, an orange-red color, a solid and a shiny luster. Are these physical
or chemical properties? - CORRECT ANSWER -Physical
, What is a physical change? - CORRECT ANSWER -Its state or its appearance will change but its
composite remains the same.
Particle move in random directions but are sufficiently attracted to each other to maintain a
definite volume, although not a rigid structure. - CORRECT ANSWER -Liquid
Water as a _____takes the ______ of its container. - CORRECT ANSWER -Liquid; Shape
Strong attractive forces hold particles such as atoms or molecules close together. The particles
are arranged in such a rigid pattern that only vibrate slowly in fixed position. - CORRECT
ANSWER -Solid
What is a chemical change? - CORRECT ANSWER -When an original substance is converted into
1 or more NEW substances, which has different chemical & physical properties.
Particles are far apart, have little attraction to each other and move at high speeds, taking shape
and volume of its container. - CORRECT ANSWER -Gas
What is an atom? - CORRECT ANSWER -Basic unit of matter that consists of a dense central
nucleus surrounded by a cloud of negatively charged electrons.
Water boiling is what kind of physical state? - CORRECT ANSWER -Change of state
Freezing from liquid water to Ice is what kind of physical state? - CORRECT ANSWER -Change of
state
Dissolving sugar in water is what kind of physical state? - CORRECT ANSWER -Change of
appearance
