VSEPR shapes and polarity

Front

What is the VSEPR theory used for?

Back

VSEPR (Valence Shell Electron Pair Repulsion) theory is used to predict the geometry of individual molecules based on the repulsion between the electron pairs in the valence shell of the central atom.

Front

What molecular shape corresponds to a tetrahedral arrangement?

Back

A tetrahedral arrangement corresponds to a molecular shape where a central atom is bonded to four other atoms, with bond angles of approximately 109.5 degrees.

Front

What is the molecular geometry of CO₂?

Back

The molecular geometry of CO₂ (carbon dioxide) is linear.

Front

How can you determine if a molecule is polar or non-polar?

Back

A molecule is polar if it has a net dipole moment due to the presence of polar bonds and an asymmetrical shape. It is non-polar if the dipole moments cancel out due to symmetry.

Front

What is the molecular shape of BF₃?

Back

The molecular shape of BF₃ (boron trifluoride) is trigonal planar.

Front

What is the significance of bond angles in molecular geometry?

Back

Bond angles are significant because they influence the shape of the molecule, which in turn affects its polarity and reactivity.

Front

What type of molecular geometry does a molecule with two bonded atoms and no lone pairs have?

Back

A molecule with two bonded atoms and no lone pairs has a linear molecular geometry.

Front

What is the bond angle in a tetrahedral molecular geometry?

Back

The bond angle in a tetrahedral molecular geometry is approximately 109.5 degrees.

Front

What is the difference between a polar and non-polar bond?

Back

A polar bond occurs when there is a significant difference in electronegativity between the two atoms, leading to an unequal sharing of electrons. A non-polar bond occurs when the electronegativity difference is negligible, resulting in equal sharing.

Front

What molecular shape is associated with a central atom bonded to three atoms and one lone pair?

Back

The molecular shape associated with a central atom bonded to three atoms and one lone pair is trigonal pyramidal.