BSC 2010C Study Guide - Midterm Guide: Molar Concentration, Motor Oil, Chemical Formula

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16 Oct 2017
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Matter is anything that takes up space and has mass. It is comprised of elements which may be individual or combined in various ratios to form compounds or molecules. Element: a su(cid:271)sta(cid:374)(cid:272)e that (cid:272)a(cid:374)(cid:859)t (cid:271)e (cid:271)(cid:396)oke(cid:374) do(cid:449)(cid:374) to othe(cid:396) su(cid:271)sta(cid:374)(cid:272)es (cid:271)(cid:455) (cid:272)he(cid:373)i(cid:272)al (cid:396)ea(cid:272)tio(cid:374)s so once you go below the level of matter, you are dealing with subatomic particles: ex: gold, copper, carbon, oxygen. Most living organism are made of just four: Compound: a substance consisting of 2 or more different elements in a fixed ratio: ex: nacl. Atom: smallest unit of matter that still retains the properties of an element: made up of subatomic particles, neutrons (neutral, protons (+, electrons (-) Protons and neutrons are located in the atomic nucleus measure the mass of atoms in daltons: atomic mass unit, or amu. Atomic number: # of protons in an element. Mass number: protons + neutrons in an atom: ex: # of neutrons = mass # - atomic #

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