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By: Chris Garney What Part of the Atom Is Affected by Chemical Reaction? Electrons are the negatively charged. This particle is about 1,000 times smaller.

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Presentation on theme: "By: Chris Garney What Part of the Atom Is Affected by Chemical Reaction? Electrons are the negatively charged. This particle is about 1,000 times smaller."— Presentation transcript:

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2 By: Chris Garney

3 What Part of the Atom Is Affected by Chemical Reaction? Electrons are the negatively charged. This particle is about 1,000 times smaller than the mass of a proton. It is impossible to see where they are at a specific moment due to the speed it moves at. Their chemical bond is Electrovalent, or Ionic. They are the only part in the atom affected by chemical reaction. lectron.html istry/rushin/StudentProjects/Eleme ntWebSites/iodine/electrons.gif

4 During a chemical reaction bonds between atoms or molecules are either being broken or formed. For example vinegar and baking soda creates this chemical reaction The acid in the weak 5% substance (vinegar) reacts with the pure substance (baking soda) Laws of Conservation – Matter can not be created or destroyed. That total mass of products before and after reaction is the same. Signs of Chemical Reaction – bubbling, fizzing, temperature change, color change, catches on fire, etc. Reactants – are the materials that is used for the chemical reaction Products – is the substance(s) made afterwards /change/reactant.htm What is happening during a chemical Rx? ogger.com/_rcYeSOWZ2Yc/RgyexQo8PFI/AAAAAAAA ACg/Z- BodVTHc6o/s320/vinegar_soda.jpg&imgrefurl=http://ec o-centric.blogspot.com/2007/03/bubble-bubble-toil- and-trouble.html&usg=__7iorSWGYTEvk- y2Ume4WGwKRBAQ=&h=150&w=150&sz=7&hl=en&st art=13&um=1&tbnid=blIoyvcmDzu_hM:&tbnh=96&tbn w=96&prev=/images%3Fq%3Dbaking%2Bsoda%2Band %2Bvinegar%2Breaction%26um%3D1%26hl%3Den

5 Explain the role of energy in chemical reactions. Chemical potential energy is energy that is stored in the bonds of molecules or atom. This energy holds these particles together. Examples: Biomass, Petroleum, Natural gas, and Propane. Activation energy is the energy that is needed to create a chemical reaction Exothermic – reaction gets hot Endothermic- reactions get cold EXOTHERMIC EXAMPLE Gasoline + Fire = EXPLOSION

6 ENDOTHERMIC EXAMPLE Baking soda + Fire commons/thumb/c/c1/Streichholz.jpg/250px-Streichholz.jpg commons/thumb/c/c1/ = EXTINGUISHED out.jpg

7 Types of Chemical Rxs Explain what happens in the different types of reactions Synthesis – is the combination of 2 0r more pre-existing elements. Creating something new. Decomposition – is when a chemical compound is separated into a smaller compound or element Combustion – or burning is a exothermic reaction produces heat. Can be a flame or just a glow Single Replacement – takes one element with a chemical which results to another element being created. For example putting aluminum in copper chloride creates copper Double Replacement - when a positive ion or Cation combines with a negative ion or anion. For example barium chloride and sodium sulfate creates a white powder.

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