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Unit 2 Chemistry

Explore how atoms bond to form compounds in chemistry. Electrons strive for stability by surrounding themselves with eight valence electrons. Discover the processes of donation, sharing, and stealing of electrons between atoms, leading to ionic and covalent bonds. In ionic bonds, metals donate electrons to non-metals, while covalent bonds involve non-metals sharing electrons. Learn about common compounds through examples like NaCl, CO2, and CaSO4, and grasp the concept of polyatomic compounds. This assignment focuses on identifying and understanding different types of chemical bonds.

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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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