CM

• Chemical Bonding - define a bond as a force that holds groups of two or more atoms together and makes the function as a unit
• Solid Sodium Chloride

  • is dissolved in water, resulting solution conducts electricity
  • is compposed of Na- and Cl-ions
  • very sturdy material
  • melting point of 800 oc
• Ionic Bonding - are formed when an atom that loses electrons relatively easily reacts with an atom that has a high affinity for electrons
• ionic compound - results when a metal react with a nonmetal
• • loses electrons reacts with an atom that has a high electrons

  A) ionic bond

  
• When a metal reacts with a nonmetal

  A) Ionic Compound

  
• covalent bonding - when two h2 molecule is more stable than two separated hydrogen atoms by a certain quantity of bond energy
• Nonpolar covalent bond

  • when H2 molecule is more stable than two separated hydrogen atoms by a certain quantity of bond energy
  • formed between the hydrogen atoms
• Polar covalent bond

  • where two atoms involved in the covalent bond are not the same
  • attraction is not the same
  • The bonding electrons are pulled more toward the atom with the greater attraction (more electronegative atom)
• water - it consists of a covalent bond containing hydrogen and oxygen bonding together to make H20
• Diamond

  • giant covalent bond
  • giant molecular structure
  • four covalent bond
  • melting and boiling point is high
• Rubber - is sticky when warm and brittle when cold
• Charles Goodyear - accidently dropped a mixture of sulfur and natural rubber