Multiple Choice
Which of the following is a chemical property of the noble gases?
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1. Intro to General Chemistry
Chemical Properties
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Which of the following best describes a compound?
A
A mixture of two or more substances that can be separated by physical means
B
A solution containing dissolved ions
C
A pure substance consisting of only one type of atom
D
A substance composed of two or more elements chemically combined in fixed proportions
Verified step by step guidance1
Understand the definition of a compound: it is a pure substance formed when two or more different elements are chemically combined in fixed proportions.
Recognize that a mixture consists of two or more substances physically combined and can be separated by physical means, so it is not a compound.
Note that a solution containing dissolved ions is a type of mixture (specifically a homogeneous mixture), not a compound.
Identify that a pure substance consisting of only one type of atom is an element, not a compound.
Conclude that the best description of a compound is 'A substance composed of two or more elements chemically combined in fixed proportions.'
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