The Chemical contrast of life The essentials
The Chemical contrast of life The essentials Biology 101
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This 2 page Class Notes was uploaded by Ashley Marie Everette on Friday August 26, 2016. The Class Notes belongs to Biology 101 at Tri-County Technical College taught by Sharon M. Homer-Drummond in Fall 2016. Since its upload, it has received 5 views. For similar materials see General Biology in Science at Tri-County Technical College.
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Date Created: 08/26/16
Bio 101 8/19/2016 Chapter 2- The Chemical Context of life (The essentials) Atoms: The basic unit of a chemical element, also known as the fundamental units of matter. Atoms are composed of smaller subatomic particles. - Subatomic: smaller than or occurring within an atom. These smaller subatomic particles are: Protons: Protons have a positive 1 charge! Neutrons: Neutrons are neutral! - Think Neutron=Neutral Electrons: Electrons have a negative 1 charge! Electrons have greater energy the further out they are from the nucleus. EVERY element has protons, neutrons, electrons, atomic number, and a mass number. Atomic mass number= protons + neutrons Atomic number= Protons Mass: A measure of how much substance Matter: Anything of the substance Weight: The force of gravity inserted on an object of given mass. ISOTOPES Isotopes have the same atomic number, but a different mass. Potential energy does not do work, but has the potential to do so. (Not moving) Kinetic energy does do work. (Moving) Different Bonds Covalent bonds: 2 electrons May share multiple pairs of electrons Types of covalent bonds Nonpolar: equal sharing Polar: unequal sharing Hydrogen Bonds: Hydrogen bonds result from an attraction in between two opposite partial charges of two covalent polar molecules. Ionic Bonds: Forms when one interacting atom is way more electronegative then others. Bio 101 8/19/2016 One gains an electron, while the other loses an electron. IONIC BONDS ARE THE STRONGEST BOND!!!!!!!! Cation: Any positive ion. Anion: Any negative ion These two are attracted to each other *******SIDE NOTE: ENERGY CANNEVER BE CHANGED NOR DESTROYED, ONLY TRANSFORMED…
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