BISC207- Final Exam Guide - Comprehensive Notes for the exam ( 26 pages long!)
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BISC207 Full Course Notes
Verified Note
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Document Summary
Every element except hydrogen has one or more neutrons in its nucleus. Atomic number: number of protons (subscript to the left) Mass number: number of protons and neutrons (superscript to the left) Dalton (da): unit of measurement associated with protons, neutrons, and electrons. Isotopes: forms of an element with that contain equal numbers of protons but di erent numbers of neutrons- di er in atomic mass but not in chemical properties. Atomic weight: an average of all the masses of the. Radioactive isotope: an isotope with an unstable nucleus that decomposes spontaneously by emission of a nuclear electron. Substances held together by covalent bonds are called molecules. Compounds: atoms of di erent elements are bonded together. Electrons in c-h bond are shared equally due to the elements equal electronegativity. Non polar covalent bond: any bond that involves equally shared electrons: hydrophobic- water hating. Polar covalent bond: any bond that involves unequal sharing of electrons: hydrophilic- water loving.