Shapes of molecules and molecular polarity

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom

The bond angle for a molecule with 4 bonding pairs and no lone pair around the central atom is

• 107

• 90

• 109.5

• 104.5

What is the shape of this molecule:

• Trigonal planar

• Trigonal pyramidal

• Tetrahedral

• Bent

Which one could this be? 

• CO₂
• NH₃
• H₂S
• CH₄

Is this molecule polar or non-polar?

• Polar

• Non-polar

What does the Electronegativity chart tell us?

• The probability of an atom attracting with a pair of neutrons.

• The probability of an atom attracting with a pair of electrons.

• The probability of an element attracting with a pair of neutrons.

• The probability of an element attracting with a pair of electrons.

Which formula represents a nonpolar molecule?

• HBr
• H₂S
• CBr₄
• PCl₃

Which of the following molecules, based on the elements present, would be most polar?

• HF
• H₂
• HCl
• HBr

Which phrase correctly describes the distribution of charge and the molecular polarity of ethane?

• symmetrical and polar
• asymmetrical and polar
• asymmetrical and nonpolar
• symmetrical and nonpolar

XeF4 is a square planar. It has

• 4 bonding pairs

• 6 bonding pairs

• 4 bonding pairs with 2 lone pairs

• 5 bonding pairs with 1 lone pair