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CHAPTER 2

CHEMICAL BASIS OF LIFE. CHAPTER 2. Bohr’s Atom. electrons in orbits. nucleus. Nitrogen (N). 7. N. 14. 7 e-. Electron valence: 6. C. O. Valence: 2 (8- 6 = 2) Unpaired e - = 2. Electron valence: 5. O. N. Valence: 3 ( 8- 5 =3) Unpaired e - = 3. Electron valence : 4. N.

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CHAPTER 2

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  1. CHEMICAL BASIS OF LIFE CHAPTER 2

  2. Bohr’s Atom electrons in orbits nucleus

  3. Nitrogen (N) 7 N 14 7 e-

  4. Electron valence: 6 C O Valence: 2 (8-6 = 2) Unpaired e- = 2 Electron valence: 5 O N Valence: 3 ( 8-5 =3) Unpaired e- = 3 Electron valence: 4 N C Valence: 4 (8- 4 = 4) Unpaired e- = 4

  5. ISOTOPES OF HYDROGEN Protium Deuterium Tritium Prt Ntr Prt Ntr Ntr Prt H Ntr Prt Prt H => He + 0e-1 1 2 3 3

  6. H H

  7. HYDROGEN BONDS + + + + H - - - O + H + + + -

  8. pH= -Log [H+] [ H+] = Concentration of Hydrogen ions

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