 Element  Symbol  Atom › Electron  Electron configuration  Energy level (shell)  Valence electrons › Proton  Atomic number › Neutron  Isotopes.

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Presentation transcript:

 Element  Symbol  Atom › Electron  Electron configuration  Energy level (shell)  Valence electrons › Proton  Atomic number › Neutron  Isotopes › Nucleus  Atomic mass

 Compound › Formula: simple, molecular, structural  Molecular mass › Avogadro’s number › mole  Chemical equations › Reactants › Products  Equations

 Covalent  Sharing electrons › Single bond: one pair › Double bond: two pair › Triple bond: three pair  Equal sharing  nonpolar bond  Unequal sharing  polar bond  The shape of geometric shape of a molecule dictates its biological function

 Ionic › Cations: + (lost electron)… think of ‘Little Atom’ joke › Anions: - (gained electron)  Opposites attract  Form solutions › Especially in water (which is polar) › Solvent › Solute › Hydration

 Hydrogen bonds › Between an atom with a partial negative charge and a H atom covalently bonded to oxygen or nitrogen › Water is ‘sticky’ › Relatively weak: break and reform easily

 Oxidation-reduction  Always occur together… › Oxidation  loses an electron › Reduction  gains an electron › OIL RIG : o xidation i s l oss; r eduction i s g ain  The transfer of electrons involves the transfer of the energy of that electron: often occurs in living things

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