CHEMISTRY: A MOLECULAR APPROACH
CHAPTER 25 FINAL PAPER SOLVED QUESTIONS
WITH COMPLETE ANSWERS
◉ molecule.
Answer: Two or more atoms joined chemically in a specific
geometrical arrangement.
- free atoms are rare in nature so they form molecules
◉ central goal of chemistry.
Answer: The science that seeks to understand the behavior of matter
by studying the behavior of atoms and molecules.
-If we want to understand the substances around us, we must
understand the atoms and molecules that compose them
◉ differences in atoms and molecules.
Answer: can result in large differences in the substances they
compose
- ex: graphite and diamond are both made of carbon but are
arranged in very different ways to create very different substances
◉ scientific method.
,Answer: An approach to acquiring knowledge about the natural
world that begins with observations and leads to the formation of
testable hypotheses.
- it is empirical: based on observation and experiment
- it is a process for understanding nature by observing nature and its
behavior and conducting experiments with it.
- begins with observation and ends with observation
◉ observations.
Answer: descriptions about the characteristics or behavior of nature
- data
◉ hypothesis.
Answer: A tentative interpretation or explanation of an observation.
A good one is falsifiable.
◉ experiment.
Answer: A highly controlled procedure designed to generate
observations that may support a hypothesis or prove it wrong.
◉ scientific law.
Answer: A brief statement or equation that summarizes past
observations and predicts future ones.
, ◉ theory.
Answer: •One or more well-established hypotheses may form the
basis for a scientific theory.
- it is a model for the way nature is and tries to explain what it does
and why it does it.
- can never be conclusively proven
◉ law of conservation of mass.
Answer: A law stating that matter is neither created nor destroyed in
a chemical reaction.
◉ atomic theory.
Answer: The theory that each element is composed of tiny
indestructible particles called atoms, that all atoms of a given
element have the same mass and other properties, and that atoms
combine in simple, whole-number ratios to form compounds.
◉ matter.
Answer: Anything that occupies space and has mass.
◉ substance.
Answer: A specific instance of matter such as air, water, or sand.
CHAPTER 25 FINAL PAPER SOLVED QUESTIONS
WITH COMPLETE ANSWERS
◉ molecule.
Answer: Two or more atoms joined chemically in a specific
geometrical arrangement.
- free atoms are rare in nature so they form molecules
◉ central goal of chemistry.
Answer: The science that seeks to understand the behavior of matter
by studying the behavior of atoms and molecules.
-If we want to understand the substances around us, we must
understand the atoms and molecules that compose them
◉ differences in atoms and molecules.
Answer: can result in large differences in the substances they
compose
- ex: graphite and diamond are both made of carbon but are
arranged in very different ways to create very different substances
◉ scientific method.
,Answer: An approach to acquiring knowledge about the natural
world that begins with observations and leads to the formation of
testable hypotheses.
- it is empirical: based on observation and experiment
- it is a process for understanding nature by observing nature and its
behavior and conducting experiments with it.
- begins with observation and ends with observation
◉ observations.
Answer: descriptions about the characteristics or behavior of nature
- data
◉ hypothesis.
Answer: A tentative interpretation or explanation of an observation.
A good one is falsifiable.
◉ experiment.
Answer: A highly controlled procedure designed to generate
observations that may support a hypothesis or prove it wrong.
◉ scientific law.
Answer: A brief statement or equation that summarizes past
observations and predicts future ones.
, ◉ theory.
Answer: •One or more well-established hypotheses may form the
basis for a scientific theory.
- it is a model for the way nature is and tries to explain what it does
and why it does it.
- can never be conclusively proven
◉ law of conservation of mass.
Answer: A law stating that matter is neither created nor destroyed in
a chemical reaction.
◉ atomic theory.
Answer: The theory that each element is composed of tiny
indestructible particles called atoms, that all atoms of a given
element have the same mass and other properties, and that atoms
combine in simple, whole-number ratios to form compounds.
◉ matter.
Answer: Anything that occupies space and has mass.
◉ substance.
Answer: A specific instance of matter such as air, water, or sand.
