CHEM 103 EXAM 1 (UNLV) QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Q: How is the field of Chemistry defined? A: ✔️✔️ Chemistry is the scientific
investigation of matter, focusing specifically on its makeup, internal structure,
distinct characteristics, and how it transforms during reactions.
Q: What is the scientific definition of matter? A: ✔️✔️ Matter refers to any
and all physical substances that occupy space and constitute the universe
around us.
Q: Name the three primary physical states in which matter exists. A: ✔️✔️
Matter is most commonly found in three states: Solid, Liquid, and Gas.
Q: What are the defining characteristics of a solid? A: ✔️✔️ A solid is
characterized by having both a fixed, stable shape and a specific, measurable
volume.
Q: What defines the physical state of a liquid? A: ✔️✔️ A liquid maintains a
consistent volume but does not have a fixed shape; instead, it adapts to the form
of the container holding it.
Q: What are the properties of a gas? A: ✔️✔️ A gas possesses neither a fixed
shape nor a definite volume, expanding freely to fill whatever space or
container it occupies.
What are physical properties? -ANSWER ✔️✔️Has characteristics that can be
observed OR measured without affecting the identity of a substance.
What are chemical properties? -ANSWER ✔️✔️Are those that describe the
ability of a substance to change into a new substance.
Examples of physical properties -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? -ANSWER ✔️✔️Physical
What is a physical change? -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. -ANSWER
✔️✔️Liquid
Water as a _____takes the ______ of its container. -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. -ANSWER ✔️✔️Solid
What is a chemical change? -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. -ANSWER ✔️✔️Gas
What is an atom? -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? -ANSWER ✔️✔️Change of state
Freezing from liquid water to Ice is what kind of physical state? -ANSWER
✔️✔️Change of state
Dissolving sugar in water is what kind of physical state? -ANSWER
✔️✔️Change of appearance
Hammering gold ingot into shiny gold leaf is what kind of physical state? -
ANSWER ✔️✔️Change of shape
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Q: How is the field of Chemistry defined? A: ✔️✔️ Chemistry is the scientific
investigation of matter, focusing specifically on its makeup, internal structure,
distinct characteristics, and how it transforms during reactions.
Q: What is the scientific definition of matter? A: ✔️✔️ Matter refers to any
and all physical substances that occupy space and constitute the universe
around us.
Q: Name the three primary physical states in which matter exists. A: ✔️✔️
Matter is most commonly found in three states: Solid, Liquid, and Gas.
Q: What are the defining characteristics of a solid? A: ✔️✔️ A solid is
characterized by having both a fixed, stable shape and a specific, measurable
volume.
Q: What defines the physical state of a liquid? A: ✔️✔️ A liquid maintains a
consistent volume but does not have a fixed shape; instead, it adapts to the form
of the container holding it.
Q: What are the properties of a gas? A: ✔️✔️ A gas possesses neither a fixed
shape nor a definite volume, expanding freely to fill whatever space or
container it occupies.
What are physical properties? -ANSWER ✔️✔️Has characteristics that can be
observed OR measured without affecting the identity of a substance.
What are chemical properties? -ANSWER ✔️✔️Are those that describe the
ability of a substance to change into a new substance.
Examples of physical properties -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? -ANSWER ✔️✔️Physical
What is a physical change? -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. -ANSWER
✔️✔️Liquid
Water as a _____takes the ______ of its container. -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. -ANSWER ✔️✔️Solid
What is a chemical change? -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. -ANSWER ✔️✔️Gas
What is an atom? -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? -ANSWER ✔️✔️Change of state
Freezing from liquid water to Ice is what kind of physical state? -ANSWER
✔️✔️Change of state
Dissolving sugar in water is what kind of physical state? -ANSWER
✔️✔️Change of appearance
Hammering gold ingot into shiny gold leaf is what kind of physical state? -
ANSWER ✔️✔️Change of shape
