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Chemistry Review

Chemistry Review. What is an Atom?. smallest unit of matter that cannot be broken down (building blocks of elements) 3 Subatomic Particles of Atoms Particle Symbol Charge Location Electron e - - outer shell Proton p + + nucleus Neutron n 0 nucleus.

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Chemistry Review

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  1. Chemistry Review

  2. What is an Atom? • smallest unit of matter that cannot be broken down (building blocks of elements) • 3 Subatomic Particles of Atoms Particle Symbol Charge Location Electron e- - outer shell Proton p+ + nucleus Neutron n 0 nucleus

  3. What is an Element? • made up of only one type of atom

  4. What is a Compound? more than one type of element Examples… NaCl (salt) C6H12O6 (glucose) HCl (hydrochloric acid)

  5. How many elements do you think are in this picture? Earth’s Crust = Al, Fe, Si Water = H, O Air = N, O Person = C, H, N, O, P, S

  6. % Major Elements in the Body O 65.0 % K 0.34 C 18.0 S 0.26 H 10.0 Na 0.14 N 3.0 Cl 0.14 Ca 1.4 Fe 0.004 P 1.0 Zn 0.003 Mg 0.50 Trace Elements As, Cr, Co, Cu, F, I, Mn, Mo, Ni, Se, Si, V

  7. Elements and the Periodic Table (PT)

  8. Numbers on the PT 11 Na 23 Atomic Number (# p) Symbol Atomic Mass (# p + n)

  9. Chemical Bonding - When atoms join other atoms 2 Types: 1. Covalent – when atoms share electrons Examples: Water Glucose carbon dioxide oxygen gas hydrogen gas

  10. Bonding Cont…. 2. Ionic – when atomsgain or loseelectrons Example: Salt (NaCl)

  11. Reactants vs. Products

  12. Model Kits We will focus on Covalent bonding

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