BIOL 1F90- Midterm Exam Guide - Comprehensive Notes for the exam ( 16 pages long!)
5 Oct 2017
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Document Summary
Living organisms can be viewed and studied at different levels of organization. All places on earth where living things exist. Smallest functional units of matter that form all chemical substances. Cannot be further broken down into other substances by ordinary chemical or physical means. Each specific type of atom is a chemical element. Positive, found in nucleus,same number as electrons. Neutral, found in nucleus, number can vary. Atoms usually contain the same number of neutrons as protons. Negative, found in orbitals, same number as protons. Center of the atom where protons and neutrons are. Most of the mass of an atom is in its nucleus. Areas in which the probability of finding electrons are high. P orbitals are propeller or dumbbell shaped. Each orbital can only hold 2 electrons. Orbitals occupy energy shells that are associated with specific energy levels.
