Chapter 2[1]

Chapter 2[1] - Chapter 2 Page 1 of 3 Chapter 2: Atoms,...

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Chapter 2 Page 1 of 3 Organize From Smallest to Largest Starting with smallest/ simplest level ( typically dealt with in Chemistry) Elements: Unique substances that can’t be broken/ changed by natural processes. Atom: The smallest particle of an element that has the elements characteristics. o Ie: 1 atom of Carbon= smallest you can get Atoms contain 3 parts (sub atomic particles; fig 2-1 ): o Protons (+) # of P’s is unique to each element ( doesn’t change) o Electrons (-) Orbit around the nucleus in shells If # of protons= # of electrons the atom is neutral A shell with an even # of electrons is more stable than an odd # of electrons Atoms can/do lose, gain or share electrons: Ion: An atom where the + are not = to the – Cation: losing of an – makes the atom have a + charge Anion: gaining of – makes the atom have a – charge o Neutrons No effect on the electrical charge An element can have atoms with different # of neutrons (different
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This note was uploaded on 03/27/2011 for the course BIO 1410 taught by Professor Rast during the Fall '10 term at Texas State.

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Chapter 2[1] - Chapter 2 Page 1 of 3 Chapter 2: Atoms,...

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