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A fundamental introduction to the concepts of substances, elements, compounds, and mixtures in chemistry. It covers the differences between homogeneous and heterogeneous mixtures, diatomic elements, monatomic and diatomic molecules, and the behavior of gases. It also discusses the solubility of substances and the difference between reactants and products.
What you will learn
Typology: Summaries
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= oxygen = ozone
Br 2 = nonmetal Hg = metal substance - a sample of matter that always has the same physical and chemical properties
compound - 2 or more different elements that are chemically bonded - can be broken down in a chemical reaction
Homogeneous mixture- uniform (the same throughout) 2 or more substances physically combined Ex air, brass, salt water Heterogenous not uniform (not the same throughout) not uniformly mixed ex: soil, oil and water, cement
1 atom molecule all the same
sugar
insoluble sand soluble filtrate
Reactants Products 2H 2 O(l) (^) ➞ 2H 2 (g)^ + O 2 (g)
lower liquid lower alcohol alcohol water