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Chemistry Unit 4 Bonding

Chemistry Unit 4 Bonding. Why do atoms bond? -to become more stable -a full valence shell of electrons -valence shell = outside shell How do atoms bond? 2 main types of bonds 1. Ionic 2. Covalent. Bonding. Ionic Bonds form between a metal and a nonmetal.

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Chemistry Unit 4 Bonding

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  1. Chemistry Unit 4Bonding

  2. Why do atoms bond? -to become more stable -a full valence shell of electrons -valence shell = outside shell How do atoms bond? 2 main types of bonds 1. Ionic 2. Covalent

  3. Bonding • Ionic Bonds form between a metal and a nonmetal. • Covalent Bonds form between two nonmetals.

  4. Ionic Bonding • Ion - a charged particle *if an atom loses an e-, it is a (+) ion (now has more p+ than e-) *if an atom gains an e-, it is a(-) ion (now has more e- than p+)

  5. Ionic Bonds • When an ionic bond forms, one atom gains electrons and the other atom loses electrons. The ions are oppositely charged and therefore are attracted to each other. • An ionic bond forms from a transfer of electrons. Both atoms become more stable ions by filling their outside electron shells.

  6. Ionic bonding continued Example: e- e- e- e- e- e- e- e- e- e- e- 17 e- e- e- e- 11 e- e- 18 e- e- e- e- e- e- 12 e- e- e- e- e- e- Na Cl

  7. Ionic bonding continued e- e- e- e- e- e- e- e- e- Example: e- e- e- e- 17 11 e- e- e- e- 18 e- e- e- 12 e- e- e- e- e- e- e- Cl e- e- Na Na+1 Cl-1 NaCl Sodium chloride

  8. Covalent Bonding • Atoms share pairs of electrons to fill the valence shell H Cl e- e- e- e- e- e- e- 17 1 e- e- e- 0 e- e- 18 e- e- e- e- e- e- HCl Hydrogen chloride

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