BioChemistry

  • Everything is made of matter

  • Matter is made of atoms


Atomic number

  • Means number of Protons

  • Number of Protons = Number of Electrons

Atomic Mass

  • Number of Protons + Number of Neutrons


Life Requires 25 Chemical Elements

  • We are 96% Carbon, Hydrogen, Oxygen, Nitrogen (CHON)

  • 4 other elements make up most of the 4% (Phosphorus, Calcium, Sulfur, Potassium)


Bonds

  • 1. Covalent Bond- Share electrons

  • 2. Ionic Bond- Give/Take electrons (Not sharing)

  • Polar Covalent Bonds, pair of electrons shared unequally