The chemistry of Life<br />Elements: The smallest part that something can be broken down into.<br />Everything is made of elements<br />4 Key elements in the human body<br />O Oxygen 65%<br />C Carbon 18.5%<br />H Hydrogen 9.5%<br />N Nitrogen 3.3%<br />Trace amounts of elements<br />
The chemistry of Life<br />Atoms: The building Blocks of Elements<br />Atoms are the smallest particle of an element that still has the characteristics of that element<br />
Nucleus: Center of the atom made up of Protons (+) and Neutrons (neutral)<br />Electrons (-) orbit<br />around the nucleus<br />
Compounds: a substance that is composed of two or more different elements<br />ex. Salt (NaCl) Water (H2O)<br />Types of bonds<br />Covalent: Share Electrons (more common)<br />Ionic: Transfer Electrons<br />
Chemical Reactions: occur when bonds are either formed or broken. The breaking of the bonds releases energy.<br />
Mixtures: A combination of substances in which they individual components retain their own properties. ( ex. Sand and sugar combined) <br />Can be easily seperated<br />
Solutions: A mixture in which one or more substances (Solutes) are distributed evenly in another substance (Solvents)<br />The particles will not settle out<br />Ex. gatorade<br />
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