1.2 covalent bonding student

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1.2 covalent bonding student

  1. 1. Bonding How are chemical bonds formed?
  2. 2. Chemical Bonds • Atoms are most stable _______________ _________________________________ • To obtain a full shell atoms can: –______________or __________ electrons (forming cations or anions) –___________ electrons (form a covalent bond)
  3. 3. Covalent Bonds • Non-metals generally have 4,5,6,7 or 8 electrons in the outer shell • If they bond with each other, electrons are shared Cl Cl valence electrons can be shared Cl Cl Outer shells overlap and valence electrons are shared
  4. 4. Bonds • Covalent bonds – _________________________________________ _________________________________________ – Valence electrons are shared between ___________ atoms to fill a an atom’s octet • ___ shared electrons: single bond • ___shared electrons: double bond • ___shared electrons: triple bond
  5. 5. Lewis Dot Structures – Representing Elements • Identify the number of valence electrons in each atom. • Spread them around the atom symbol – first individually, then in pairs • Oxygen= _________ O
  6. 6. Lewis Dot structures of molecules • Method #1 – Put your atoms together. – If Octet is not filled, slide e- pairs to form double, triple bonds. • Method #2 – Count total number of valence electrons. – Fill central atom’s octet first – Create double, triple bonds if necessary.
  7. 7. Covalent compounds • Draw electronic structure diagrams to show how the following elements or compounds are formed: – Methane (CH4) – Oxygen (O2) – Nitrogen (N2) – Water (H2O) – Carbon dioxide (CO2) – Carbon monoxide (CO)
  8. 8. Naming Covalent Compounds • Draw the structure to find out how many of each element there are. • Write the formula with correct subscripts. • Name the formula- write the names of the elements. • Include prefixes to match subscripts. – NO MONO- on the first element! • Make sure there’s an “-ide” on the end.
  9. 9. Prefixes • 1- Mono- • 2- Di- • 3- • 4- • 5- • 6- • 7-
  10. 10. Covalent name formula • To do this you….
  11. 11. Fill in the following table: # EACH ATOM FORMULA NAME Bond types 1 CARBON, 4 CHLORINE HS2 Sulfur dioxide Sulfur trioxide 2Nitrogen 4Oxygen

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