CHEM 6A Chapter Notes - Chapter 2: Binary Phase, Heavy Water, Subatomic Particle

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CHEM 6A Full Course Notes
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CHEM 6A Full Course Notes
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Atomic theory: all substances consists of either atoms or molecules. Element: substance that cannot be broken down into simpler substances. An element is a substance that consists of only atoms with the same nuclear charge. Most substances are made up of 40 elements. 10 element make up over 99% total mass of earth. 70% of mass of human body is water oxygen and hydrogen mostly. Study shows hydrogen make up 90% of atoms and 75% of mass of universe. Compound: break down into two or more elements. Solid at room temp (20 degree) except mercury. Ex: hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. Chemical symbols: abbreviation used for designated elements. Atom: smallest molecule: 2 or more atoms joined together diatomic molecule: molecule with just two atoms. Natural diatomic elements have names ending with -ine or -gen. 2. 2 the states of matter include solids, liquids, and gases. States of matter: solids, liquids, and gases.

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