CHEM 207 - Chapter #5 & #6 - Atoms and Elements

CHEM 207 - Chapter #5 & #6 - Atoms and Elements -...

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Unformatted text preview: Chemistry Inorganic, Organic and Biochemistry http://www.periodictable.com/index.html P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m 1. Abundance of Elements in the Universe s Consider a grid with 20 x 10 squares representing 200 atoms. s If this were the universe, then 183 atoms would be Hydrogen, H . s 17.5 would be Helium, He s less than 1 would be all the other elements ! P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m Paper demonstration s Hold up your small square of paper and follow your professors instructions P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m 2. Abundance of elements in the Earth s Mostly oxygen , O, 47.3 %, and silicon, Si , 27.7 %. P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m 3. Abundance of elements in You. s Hydrogen = 60.3 % s Oxygen = 25.5 % s Carbon = 10.5 % s Nitrogen = 2.42 % s Calcium = 0.226 % s Phosphorus= 0.134 % P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m 3. Abundance of elements in You. s Sulfur = 0.132 % s Potassium= 0.036 % s Chlorine= 0.032 % s Magnesium= 0.01 % s Traces of Mn , Fe , Cu , Zn , Co P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m 4. The Periodic Table s A visual method for listing elements in common groups . s These groupings have similar chemical properties , such as carbon, C, and silicon, Si, that react the same way with hydrogen, i.e. CH 4 and SiH 4 P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m 4. The Periodic Table s Z= atomic number s Atomic number is the number of protons in the nucleus or number of electrons orbiting the nucleus P D F C r e a te d w i t h d e s k P D F T S P D F W r i te r- D E M O : : h t tp : / /w w w .d o c u d e s k . c o m The First Twenty Elements...
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CHEM 207 - Chapter #5 & #6 - Atoms and Elements -...

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