Exam (elaborations)
CEM 101 – KEYWORDS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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CEM 101 – KEYWORDS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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CEM 101 – KEYWORDS QUESTIONS ANDANSWERS WITH SOLUTIONS 2024
Accuracy - ANSWER How close a measurement is to the true value
Atom - ANSWER The basic unit of a chemical element.
Chemical Change - ANSWER A change in matter that produces one or more new substances
Chemical Property - ANSWER The ability of a substance to undergo a specific chemical change
Compound - ANSWER A substance made up of atoms of two or more different elements joined by
chemical bonds
Density - ANSWER Mass per unit volume
Exponent - ANSWER A mathematical notation indicating the number of times a quantity is multiplied by
itself
Gas - ANSWER A state of matter with no definite shape or volume
Heterogenous Mixture - ANSWER A mixture in which the composition is not uniform throughout
Homogenous Mixture - ANSWER A mixture in which the composition is uniform throughout
Hypothesis - ANSWER An educated guess
Intensive Property - ANSWER
Law - ANSWER
, Liquid - ANSWER A state of matter that has no definite shape but has a definite volume
Mass - ANSWER A measure of the amount of matter in an object
Matter - ANSWER Anything that has mass and takes up space
Mixture - ANSWER A combination of two or more substances that are not chemically combined
Molecule - ANSWER A group of atoms bonded together
Physical Change - ANSWER
Physical Property - ANSWER
Precision - ANSWER The exactness of a measurement
Pure Substance - ANSWER A substance made of only one kind of matter and having definite properties.
Scientific Method - ANSWER A logical, systematic approach to the solution of a scientific problem
Significant Digits - ANSWER The digits in a decimal number that carry meaning contributing to the
precision or accuracy of the quantity
Solid - ANSWER A form of matter that has a definite shape and volume
Temperature - ANSWER A measure of the average energy of motion of the particles of a substance
Theory - ANSWER A hypothesis that has been tested with a significant amount of data
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