Biology_105_1.pdf BIOL 105 - 03
Minnesota State University, Mankato
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This 2 page Class Notes was uploaded by Jean Notetaker on Sunday September 11, 2016. The Class Notes belongs to BIOL 105 - 03 at Minnesota State University - Mankato taught by Marilyn Hart in Fall 2016. Since its upload, it has received 5 views.
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Date Created: 09/11/16
Biology 105 Friday, August 12, 2016 1:07 AM Basics-Chemistry Of Life Molecules-what all organisms are composed of; a collection of atoms Niels Bohr-Proposed that every atom has an orbiting cloud of electrons around the nucleus(protons and neutrons) Neutron-Similar mass of a proton (1 Dalton) No charge -Neutral Protons -(+) charge Determines the chemical characteristics of an atom Rule There is one proton for every electron(most of the time) Electrons-(-) charge 1. Orbit atoms nucleus at different distances 2. (-) electron= (+)protons 3. Very small mass (1/1800 Dalton) 4. Stay in orbit because attracted to (+) charge of the nucleus -Because of Orbital of electrons creates potential energy. Isotopes-Atoms that have the same number of protons but a different number of neutrons Bonds Chemical Bonds-the force holding 2 atoms together Ionic bonds-one atom gains an electron and the other loses an electron(steal) Bonds Chemical Bonds-the force holding 2 atoms together Ionic bonds-one atom gains an electron and the other loses an electron(steal)
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