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Chemistry (38)
CHM 2045 (12)
Chapter 2

Chapter 2 Vocabulary.docx

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Department
Chemistry
Course
CHM 2045
Professor
John Mitchell
Semester
Spring

Description
Chapter 2 Vocabulary/Key Notes The components of Matter 2.1 Elements, Compounds, And Mixtures: An Atomic Overview A. Substance a. Matter whose composition is fixed B. Element a. Simplest type of matter with unique physical and chemical properties b. Consists of only one kind of atom C. Compounds a. Consists of two or more different elements that are bonded chemically b. Each unit of the compound consists of a fixed number of atoms of each  element c. Properties are different from the properties of its component elements D. Mixture a. Consists of two or more substances that are physically intermingled b. The components of a mixture CAN vary in their parts by mass c. NOT A SUBSTANCE 2.2 Observations that led to an atomic view of matter A. Law of Mass conservation a. Total mass of substances does not change during a chemical reaction b. The number of substances may change, as well as their properties, but the  total amount of matter remains constant c. Matter cannot be created or destroyed B. Law of definite composition a. No matter what its source, a particular compound is composed of the same  elements in the same parts by mass C. Fraction by mass a. Part of the compound’s mass that each element contribute b. Fixed no matter what the size of the sample c. Mass of compound x part by mass of element/mass of compound D. Percent by mass a. Fraction by mass expresse
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