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Chapter 2: The chemical context of life BIOLOGY

by: Ashley Marie Everette

Chapter 2: The chemical context of life BIOLOGY Biology 101

Marketplace > Tri-County Technical College > Science > Biology 101 > Chapter 2 The chemical context of life BIOLOGY
Ashley Marie Everette
GPA 4.0

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About this Document

These notes cover the basics of atoms, and bonds.
General Biology
Sharon M. Homer-Drummond
Class Notes
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This 2 page Class Notes was uploaded by Ashley Marie Everette on Wednesday August 24, 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 9 views. For similar materials see General Biology in Science at Tri-County Technical College.


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Date Created: 08/24/16
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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