Bio203 Exam1 StudyGuide

Bio203 Exam1 StudyGuide - Bio203 Exam1 CHAPTR 2: 96% Carbon...

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Bio203 Exam1 CHAPTR 2: 96% Carbon based life forms = CHON, Carbon, Hydrogen, Oxygen, Nitrogen Matter =Organisms Element=substance that cannot be broken down to other substances Compound=two or more elements Silicon Life forms=Diatoms Elemental Properties: Atomic Number: Subscript to Element. = Protons in nucleus, and # electrons Mass number: Sum of P+N Isotopes: Same # P, different N. Therefore mass difference. Molecules: 2 or more atoms held together by covalent bonds. Single Covalent Bond: 1 pair of shared of valence electrons Double Covalent Bond: 2 paired shared of valence electrons. C = 4 covalent bond H = 1 covalent bond O = 2 covalent bond N = 3 covalent bond Covalent Bond = Form with same element or atoms of different elements Bonding capacity = atoms Valence Ionic Bonds = strip electrons from partners, attracted by anion and cation *ie. NaCl (a charged atom is called an ion) Weak chemical bonds: -Reinforce shapes of molecules -help molecules adhere to each other 1. Ionic 2. Hydrogen
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Bio203 Exam1 StudyGuide - Bio203 Exam1 CHAPTR 2: 96% Carbon...

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