Bio 1B Test (april 3 2008)

Set: Bio 1B Test (april 3 2008)

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	Term	Definition
	What is an atom	Basic unit of matter
	What are the 3 subatomic particles that make up an atom	protons, neutrons, and electrons
	What is an element	a substance consisting entirely of one type of atom
	What is a compound	a substance formed by the chemical combination of two or more elements in definate proportions
	What is a molecule	the smallest unit of most compounds (mostly covalent compound)
	What is an ionic compound	a compound where the electrons exchange and the ions are held together by opposite charges (metal and a non-metal)
	What is a covalent compound	a compound where the electrons are shared (non-metal and non-metal)
	What is an acid	a compound that FORMS hydrogen ions (H+) in solution--give off H+ ions
	What is a base	a compound that PRODUCES hydroxide ions (OH+) in solution--accepts H+ ions
	What are the products of a mixture of an acid Nand base	water and salt
	pH scale	meausrment system used to indicate the concentration of hydrogen ions in solution (ranges from 0 to 14)
	What numbers on the pH scale measure an acid? A base	0-6 for acid 7 is water and 8-14 is base
	What is heartburn	when the acid from your stomach (which has a pH of 0) come up into your esophagus and creates a burning feeling
	How did antiacids combat heartburn	they lower the pH so that it has a higher number such like a base so that it doesnt hurt your organs
	What does the pH measure	acidity and alkalinity (idk how to spell that)