Chapter 4 Body Basics

2 compounds compound molecule that contains 2 or more

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Unformatted text preview: mselves Insert Figure 4.2 Compounds Compound – Molecule that contains 2 or more different elements Solution – Evenly distributed mixture of 2 compounds The 2 compounds in a solution are: Solvent - the greater component Solute - lesser component Water is the solvent for many solutions. Solubility Insert figure 4.3 Describes how easily a substance dissolves in a liquid Ions Ion – Electrically-charged atom or group of atoms. Ions form when the atom or group of atoms gains or loses 1 or more electrons Negative charge - gain of an electron OH­ (hydroxide ion) Positive charge - loss of an electron H+ (hydrogen ion) Insert Figure 4.4 What Are Acids and Bases? Acids – Donate hydrogen ions Bases – Accept hydrogen ions pH – Measure of acidity or alkalinity of a solution Insert Figure 4.5 What’s a Chemical Reaction? Chemical Reaction Process that changes atomic arrangement of molecules Digestion Process by which molecules in food are mechanically and chemically broken down Metabolism Chemical reactions occurring in living cells Enzymes Enzyme – Protein that speeds up the rate of a chemical reaction but is not altered during the process Names of most enzymes end in “ase”...
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