BI SC 003 Study Guide - Midterm Guide: Hydrogen Sulfide, Covalent Bond, Electron Shell

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25 Oct 2016
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6 characteristics of living organisms: living things are made of cells, living things obtain and use energy, living things grow and develop, living things reproduce, living things respond to the environment, living things adapt and to the environment. Organization of living organisms: atoms, molecules, cells, tissue, organ, organ system, organism, population, community, ecosystem, biosphere. Elements simplest pure substance that can not be broken down into any other substance. Atomic mass number of protons in the nucleus of the atom. Covalent atoms in a covalent bond share electrons, this results in a stable outer electron shell. Ionic atoms donate or take on electrons, this results in charged particles called ions. Hydrogen occur when a covalently bonded hydrogen and negatively charged atom combine in one molecule. Acids a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.

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