Warm Up: December 4

1
Warm Up December 4

• Use electron-dot structures to demonstrate the
  formation of ionic compounds involving the
  following elements. Give the formula for the
  stable compound formed.
• magnesium (Mg) and sulfur (S)
• aluminum (Al) and chlorine (Cl)
• barium (Ba) and nitrogen (N)

2
Covalent Bonding

• Covalent Bond Valence electrons shared between
  two atoms.
• Molecule a group of covalently bonded atoms.
• Molecules usually consist of a nonmetal bonded to
  a nonmetal or a metalloid bonded to nonmetal.

3

• Example H2
• s-orbital of one hydrogen atom overlaps with the
  s-orbital of an other hydrogen atom.
• A dash is used to represent a shared pair of
  electrons.
• Example Cl2
• Single covalent bond share one pair of
  electrons between two atoms.

4
Drawing Molecules

• We can use electron dot notation to help show how
  the atoms in a molecule are held together.
• These drawings are known as Lewis structures.
• All atoms seek to fill their outer energy shell,
  most follow the Octet rule, where they will have
  8 electrons on their outer level.
• Hydrogen only wants 2, as its in the 1s energy
  level.

5
One Minute Paper

• You have one minute to answer these two questions
  concerning todays lesson.
• What was the most important thing you learned?
• What is one question you would still like
  answered?