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Matter set 2

Matter set 2Matter set 2Matter set 2Matter set 2Matter set 2Matter set 2Matter s

QuestionAnswer
molecule a group of two or more atoms held together by chemical bonds
mixture two or more substances that are together in the same place but their atoms are not chemically bonded
homogeneous mixture made of 2 or more substances that are so evenly mixed you cannot see the different parts (their atoms have not chemically bonded)
physical change changes the form or appearance of matter but does not turn any substance in the matter into a new substance; the original substance remains
chemical change a change in matter that produces one or more new substances; the original substance is gone
Law of Conservation of Mass states that matter is not created or destroyed in a chemical or physical change
weight a measure of the force of gravity acting on an object
heterogeneous mixture made of 2 or more substances mixed together but you can see the different parts
change to make or become different from what the substance would be if left alone
energy the ability to do work or cause change
exothermic change a change in which energy is given off; energy is released
endothermic change a change in which energy is absorbed (taken in)
compound a substance made of two or more elements that are chemically combined in a set ratio
atom the basic particle from which all elements are mad
chemical bond a force of attraction between two atoms; happens when atoms combine
subscript numbers that come after an element’s symbol in a chemical formula; these tell the number of atoms of that element
substance a pure form of matter that contains only one type of atom
Created by: user-1855796
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