8.2-8.3 Terms and concepts

This term describes the energy used to break a covalent bond

• energy of activation
• bond dissociation energy
• electronegativity
• resonance energy

When both electrons for a bond are contributed by just one of the atoms, which is represented with an arrow instead of a dash in the structural formula:

• covalent bond
• sigma bond
• coordinate covalent bond
• double bond

What type of bond is only found in multiple bonds?

• pi bond
• sigma bond
• single bond
• coordinate covalent bond

What bond angle is generally associated with trigonal planar molecules?

• 180
• 109.5
• 107
• 120

What bond angle is generally associated with linear molecules?

• 180
• 109.5
• 107
• 120

What shape has approximately 107 degree angles?

• tetrahedral
• pyramidal
• bent
• trigonal planar

Water is a bent molecule, and has bond angles of approximately:

• 107
• 109.5
• 105
• 120

A bond angle of 109.5 can be found in the methane molecule, which has a ______________ shape.

• tetrahedral
• square planar
• pyramidal
• trigonal planar

When a covalent bond is formed, the electrons are found in these orbitals - they have less energy than that of either of the atomic orbitals from the bonding atoms.

• atomic orbital

• pi bonding orbital

• sigma bonding orbital

• bonding orbital

What do we call the orbitals that contain electrons in an atom? They must overlap with those of neighboring atoms in order for a bond to form.

• atomic orbital
• pi bonding orbital
• molecular orbital
• bonding orbital