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Unit 2 Chemistry

Unit 2 Chemistry. Compounds. How do bonds form?. Electrons want to be surrounded by eight valance electrons at all times How do they do this: Atoms join together where they can either steal, donate or share electrons with other atoms

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Unit 2 Chemistry

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  1. Unit 2 Chemistry Compounds

  2. How do bonds form? • Electrons want to be surrounded by eight valance electrons at all times • How do they do this: • Atoms join together where they can either steal, donate or share electrons with other atoms • Typically if it less than 4 electrons will donate them and more than 4 will steal or share them

  3. Ionic bonds • If a metal and non-metals form a bond, the metal will donate electrons and the non-metal will steal them • This is called an IONIC BOND

  4. Ionic Bonds

  5. Covalent bonds • If two non-metals form a bond then the electrons will be shared between the two atoms • this is called a COVALENT BOND

  6. Video Clip

  7. examples • Name that Bond: • NaCl • CO2 • SiO2 • Fe2O3 • CuO

  8. Polyatomic compounds • While polyatomic compounds are usually covalent, when they are in a compound with another atom, it is considered ionic • Ex: CaSO4,NaOH, Al2(CO3)3, (NH4)3PO4- all are ionic

  9. assignment • Identify the bond

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