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outline 5.1

outline homework

Paragraph 1 Matter can undergo two types or changes- chemical or physical
Paragraph 2 During a chemical change, one or more substances change into new substances
Paragraph 3 A chemical reaction is a process in which atoms of one or more substances rearrange form one or more new substances
Paragraph 4 Physical properties of color, state of matter, and odor are all signs that a chemical reaction might have occurred
Paragraph 5 The only way to know if a chemical reaction has occurred is to study the chemical properties of the substances before and after the change
Paragraph 6 During a chemical reaction, one or more substances react and form one or more new substances
Paragraph 7 There are two types of substances- elements and compounds
Paragraph 8 Atoms rearrange when chemical bonds between atoms break
Paragraph 9 A chemical equation is a description of a reaction using element symbols and chemical formulas
Paragraph 10 Symbols of elements are shown in the periodic table
Paragraph11 when atoms of two or more different elements bond, they form a compound
Paragraph 12 The starting substances in a chemical reaction are reactants. The substances produced by the chemical reaction are products
Paragraph 13 When writing chemical equations, it is important to use correct chemical formulas for the reactants and the products
Paragraph 14 The law of conservation of mass states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction
Paragraph 15 During a chemical reaction, bonds break and new bonds form
Paragraph 16 An equation is written so that the number of atoms of each element is the same, or balanced, on each side of the arrow
Paragraph 17 To accurately represent this reaction, the equation needs to be balanced
Paragraph 18 A coefficient is a number placed in front of an element symbol or chemical formula in an equation
Paragraph 19 When no coefficient is present, only one unit of that substance takes part in the reaction
Created by: phillmac2704