The Chemistry of Life Ms. Cole http://atom-land.blogspot.com/2010/08/atom.html

The basic unit of matter. Atoms The basic unit of matter. Are extremely small. Made of: Protons – positively charged Neutrons – neutral Electrons – negatively charged

Atoms Nucleus http://www.universetoday.com/56469/atom-diagram/

Protons and neutrons are found _________ Atoms Protons and neutrons have similar masses. Electrons have a mass that is almost 0. Protons and neutrons are found _________ Electrons are found in _________ _______ Atoms are electrically neutral Equal # of protons and electrons

http://www.livescience.com/25300-periodic-table.html

Elements Pure substance that contains one type of atom. http://kaffee.50webs.com/Science/activities/Chem/Activity.Practice.Atomic.Structure2.html

Atoms of the same element that differ in the number of neutrons. Isotopes Atoms of the same element that differ in the number of neutrons. This causes them to have different atomic masses. Have the same # of electrons Have the same chemical properties

As a result some atoms are unstable and are called radioactive. Radioactive isotopes As a result some atoms are unstable and are called radioactive. Labels/Tracers Cancer Treatment Dating fossils. Nonradioactive carbon-12 Nonradioactive carbon-13 Radioactive carbon-14 6 electrons 6 protons 6 neutrons 6 electrons 6 protons 7 neutrons 6 electrons 6 protons 8 neutrons

Chemical Compound A substance formed by the chemical combination of two or more elements in definite proportions. What’s the chemical formula? http://theshiksa.com/2012/06/04/salt-friend-or-foe/

Chemical Bonds: Ionic Bond Form when one or more electrons are transferred from one atom to another. What are ions? http://eweb.furman.edu/~wworthen/bio111/atomreview.htm

Chemical Bonds: Covalent Bond Form when electrons are shared between atoms. http://stonersr.us/chemistry.php

Van der Waals Forces Can develop between oppositely charged regions of molecules that are close together. http://youtu.be/OoYeIsSkafI Do you see the gecko? http://www.dailymail.co.uk/news/article-1220151/Devil-The-stunning-Satanic-leaf-tailed-gecko-lizard-masters-disguise-resemble-leaf.html

Part 2 Properties of Water

H2O Is polar due to uneven distribution b/t oxygen and hydrogen. Water molecule attract to each other by hydrogen bonds. O – negative charge H – positive charge http://www.glogster.com/arooke2/hydrogen-bonds/g-6m99vd692fc7hgidt985ta0?old_view=True

Cohesion – attraction b/t molecules of the same substance. Cohesion Vs. adhesion Cohesion – attraction b/t molecules of the same substance. Adhesion – attraction b/t molecules of different substances. https://somerville-period7.wikispaces.com/Jeremy+Thomas

Solutions & Suspensions Mixture – 2 or more elements or compounds mixed together but not chemically combined. What happens when salt is mixed with water? Solution – all compounds are evenly distributed Solute – the substance that is dissolved (salt) Solvent – the substance in which the solute dissolves (water is the universal solvent) Suspension – some components do not dissolve (blood)

Acids & bases pH scale – indicates concentration of H+ ions. Acid – compound that forms H+ ions in a solution. Base – produce hydroxide ions (OH-) in a solution. Buffers – prevent sharp changes in pH. https://www.boundless.com/microbiology

Part 3: Carbon Has 4 valence electrons The most versatile element

Methane Acetylene Butadiene Benzene Isooctane

Macromolecules “Giant Molecules” Monomers – smaller units Polymers – formed by monomers