harris_outline_ch2.txt

harris_outline_ch2.txt - Chapter 2 Basic Chemistry I....

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Chapter 2 – Basic Chemistry I. Chemistry defined: The study of matter and how it can be transformed. II. Matter: Anything and everything that takes up space and has mass. III. Elements a. Element – A substance that cannot be broken down to simpler substances with different properties by ordinary chemical means. b. over 100 elements on the periodic table, 92 are naturally occurring c. carbon, hydrogen, oxygen, nitrogen, phosphorous and sulfur are the most abundant elements in living matter IV. Atomic Structure A. Atom: smallest amount of matter that shows the properties of a given element B. Atomic symbol – one of two letters that identifies the element of an atom and represents its actual name. C. Subatomic particles 1. protons – positively charged 2. neutrons – not charged 3. electrons – negatively charged D. Protons and neutrons make up the atomic nucleus, a dense core. Electrons are distributed around the atomic nucleus in an electron shell. E. Atomic mass: the mass number of a specific atom F. Atomic number: the universal number of protons in each atom G. The Periodic Table of the Elements:
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H. Isotopes: atoms of the same element that differ in the number of neutrons. ( isos,
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harris_outline_ch2.txt - Chapter 2 Basic Chemistry I....

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