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Unit 1 Vocab

CHEM 142 Unit 1 Vocab

TermDefinition
Observation Knowledge about the world received through the senses or instrumentation
Fact Something that is known to be consistent with reality
Law A brief statement that summarizes past observations and predicts future ones
Hypothesis A tentative interpretation or explanation that can be tested through observation
Theory An explanation of some aspect of the natural world that has been substantiated through repeated experiments or facts gathered over time
Accurate Value that is close to the actual "correct" value being measured
Precise Measurement that is repeatable
Matter Anything that has mass and takes up space
Atom The smallest possible component of matter capable of stable existence
Element A pure substance composed of all one type of atom
Molecule A chemical combination of two or more elements in fixed proportions
Compound A pure substance composed of more than one type of atom, but cannot be physically separated into different substances
Mixture Substances which can be physically separated into different substances
Homogeneous A mixture with uniform appearance and properties throughout
Heterogeneous A mixture with physically distinguishable components
Solution A homogeneous mixture of two or more compounds
Homonuclear Molecule composed of atoms of the same type
Heteronuclear Molecule composed of multiple types of atoms
Monatomic Molecule composed of one atom
Diatomic Molecule composed of two atoms
Triatomic Molecule composed of three atoms
Polyatomic Molecule composed of more than three atoms
Fusion Physical change from solid to liquid
Freezing Physical change from liquid to solid
Vaporization Physical change from liquid to gas
Condensation Physical change from gas to liquid
Sublimation Physical change from solid to gas
Deposition Physical change from gas to solid
Created by: user-1742018
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