Chem 103 Exam 1 (UNLV)
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What is chemistry? -
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correct answer The study of composition, structure, properties,
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and reactions of matter.
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What is matter? -
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correct answer All the substances that make up our world
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What are the 3 physical states of matter? -
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correct answer Solid, Liquid, and Gas
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What is a solid? -
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correct answer Has definite shape and volume
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What is a liquid? -
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correct answer Has definite volume but NO shape
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What is a gas? -
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correct answer Has NO definite volume OR shape
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,What are physical properties? -
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correct answer Has characteristics that can be observed OR me
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asured without affecting the identity of a substance.
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What are chemical properties? -
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correct answer Are those that describe the ability of a substanc
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e to change into a new substance.
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Examples of physical properties - ../ ../ ../ ../
correct answer Shape, Color, melting point, and physical state.
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A penny that is round shaped, an orange-
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red color, a solid and a shiny luster. Are these physical or che
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mical properties? - correct answer Physical
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What is a physical change? -
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correct answer Its state or its appearance will change but its co
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mposite remains the same. ../ ../ ../
Particle move in random directions but are sufficiently attracted
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to each other to maintain a definite volume, although not a rigi
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d structure. - correct answer Liquid
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, Water as a _____takes the ______ of its container. -
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correct answer Liquid; Shape
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Strong attractive forces hold particles such as atoms or molecul
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es close together. The particles are arranged in such a rigid patt
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ern that only vibrate slowly in fixed position. -
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correct answer Solid
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What is a chemical change? -
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correct answer When an original substance is converted into 1
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or more NEW substances, which has different chemical & phys
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ical properties.
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Particles are far apart, have little attraction to each other and m
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ove at high speeds, taking shape and volume of its container. -
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correct answer Gas
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What is an atom? - ../ ../ ../ ../
correct answer Basic unit of matter that consists of a dense ce
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ntral nucleus surrounded by a cloud of negatively charged elect
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rons.
../ ../ ../ ../
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 me
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asured without affecting the identity of a substance.
../ ../ ../ ../ ../ ../ ../
What are chemical properties? -
../ ../ ../ ../
correct answer Are those that describe the ability of a substanc
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e 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-
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red color, a solid and a shiny luster. Are these physical or che
../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../
mical properties? - correct answer Physical
../ ../ ../ ../ ../
What is a physical change? -
../ ../ ../ ../ ../
correct answer Its state or its appearance will change but its co
../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../
mposite remains the same. ../ ../ ../
Particle move in random directions but are sufficiently attracted
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to each other to maintain a definite volume, although not a rigi
../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../
d structure. - correct answer Liquid
../ ../ ../ ../ ../
, Water as a _____takes the ______ of its container. -
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correct answer Liquid; Shape
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Strong attractive forces hold particles such as atoms or molecul
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es close together. The particles are arranged in such a rigid patt
../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../
ern that only vibrate slowly in fixed position. -
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correct answer Solid
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What is a chemical change? -
../ ../ ../ ../ ../
correct answer When an original substance is converted into 1
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or more NEW substances, which has different chemical & phys
../ ../ ../ ../ ../ ../ ../ ../ ../
ical properties.
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Particles are far apart, have little attraction to each other and m
../ ../ ../ ../ ../ ../ ../ ../ ../ ../ ../
ove at high speeds, taking shape and volume of its container. -
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correct answer Gas
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What is an atom? - ../ ../ ../ ../
correct answer Basic unit of matter that consists of a dense ce
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ntral nucleus surrounded by a cloud of negatively charged elect
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rons.
