CHEM 103 EXAM 1 (UNLV) EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
a) What is chemistry? - CORRECT-ANSWERSThe study of composition, structure,
properties, and reactions of matter.
b) What is matter? - CORRECT-ANSWERSAll the substances that make up our world
c) What are the 3 physical states of matter? - CORRECT-ANSWERSSolid, Liquid, and Gas
d) What is a solid? - CORRECT-ANSWERSHas definite shape and volume
e) What is a liquid? - CORRECT-ANSWERSHas definite volume but NO shape
f) What is a gas? - CORRECT-ANSWERSHas NO definite volume OR shape
g) What are physical properties? - CORRECT-ANSWERSHas characteristics that can be
observed OR measured without affecting the identity of a substance.
h) What are chemical properties? - CORRECT-ANSWERSAre those that describe the ability
of a substance to change into a new substance.
i) Examples of physical properties - CORRECT-ANSWERSShape, Color, melting point, and
physical state.
, j) A penny that is round shaped, an orange-red color, a solid and a shiny luster. Are these
physical or chemical properties? - CORRECT-ANSWERSPhysical
k) What is a physical change? - CORRECT-ANSWERSIts state or its appearance will change
but its composite remains the same.
l) Particle move in random directions but are sufficiently attracted to each other to
maintain a definite volume, although not a rigid structure. - CORRECT-ANSWERSLiquid
m) Water as a _____takes the ______ of its container. - CORRECT-ANSWERSLiquid; Shape
n) 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-ANSWERSSolid
o) What is a chemical change? - CORRECT-ANSWERSWhen an original substance is
converted into 1 or more NEW substances, which has different chemical & physical
properties.
p) Particles are far apart, have little attraction to each other and move at high speeds,
taking shape and volume of its container. - CORRECT-ANSWERSGas
q) What is an atom? - CORRECT-ANSWERSBasic unit of matter that consists of a dense
central nucleus surrounded by a cloud of negatively charged electrons.
r) Water boiling is what kind of physical state? - CORRECT-ANSWERSChange of state
CORRECT QUESTIONS AND ANSWERS
2025
a) What is chemistry? - CORRECT-ANSWERSThe study of composition, structure,
properties, and reactions of matter.
b) What is matter? - CORRECT-ANSWERSAll the substances that make up our world
c) What are the 3 physical states of matter? - CORRECT-ANSWERSSolid, Liquid, and Gas
d) What is a solid? - CORRECT-ANSWERSHas definite shape and volume
e) What is a liquid? - CORRECT-ANSWERSHas definite volume but NO shape
f) What is a gas? - CORRECT-ANSWERSHas NO definite volume OR shape
g) What are physical properties? - CORRECT-ANSWERSHas characteristics that can be
observed OR measured without affecting the identity of a substance.
h) What are chemical properties? - CORRECT-ANSWERSAre those that describe the ability
of a substance to change into a new substance.
i) Examples of physical properties - CORRECT-ANSWERSShape, Color, melting point, and
physical state.
, j) A penny that is round shaped, an orange-red color, a solid and a shiny luster. Are these
physical or chemical properties? - CORRECT-ANSWERSPhysical
k) What is a physical change? - CORRECT-ANSWERSIts state or its appearance will change
but its composite remains the same.
l) Particle move in random directions but are sufficiently attracted to each other to
maintain a definite volume, although not a rigid structure. - CORRECT-ANSWERSLiquid
m) Water as a _____takes the ______ of its container. - CORRECT-ANSWERSLiquid; Shape
n) 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-ANSWERSSolid
o) What is a chemical change? - CORRECT-ANSWERSWhen an original substance is
converted into 1 or more NEW substances, which has different chemical & physical
properties.
p) Particles are far apart, have little attraction to each other and move at high speeds,
taking shape and volume of its container. - CORRECT-ANSWERSGas
q) What is an atom? - CORRECT-ANSWERSBasic unit of matter that consists of a dense
central nucleus surrounded by a cloud of negatively charged electrons.
r) Water boiling is what kind of physical state? - CORRECT-ANSWERSChange of state
