[BIOL-K 101] - Final Exam Guide - Ultimate 73 pages long Study Guide!
29 Nov 2016
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96. 3 % of you is carbon, oxygen, hydrogen, and nitrogen. Element substance made from one group of atoms. Compound substance of two or more elements in a fixed ratio. Emergent properties different from those of its individual elements. Atomic number number of protons in it nucleus. Mass number is the sum of protons plus neurons in the nucleus. Neutrons (o) = often equal to number of protons. Electrons (-) = equals to protons if an atom (uncharged) Blue i(cid:374)g = ele(cid:272)tro(cid:374)s o(cid:374) ea(cid:272)h (cid:862)shell(cid:863) for ea(cid:272)h ele(cid:373)e(cid:374)t. Carbon = excellent building material due to it having four open ports. Ionic bond - electrons transferred, not shared (nacl) Hydrogen bond - (between 2 molecules) h atom covalently bonded to one electronegative atom is attracted to another electronegative atom. Anion - negatively charged ion (gains an electron) Ionic bond = attraction between an anion and cation. Non-polar covalent bond electrons shared equally (ch4) Polar covalent bond electrons shared unequally (h2o)
