Unit 5 Post-Assessment Remediation (PAR)

Front

What is molecular polarity?

Back

Molecular polarity refers to the distribution of electrical charge over the atoms in a molecule. A molecule is polar if it has a net dipole moment due to the presence of polar bonds and an asymmetrical shape.

Front

What is the charge distribution in a polar molecule?

Back

In a polar molecule, the charge distribution is asymmetrical, leading to regions of partial positive and negative charges.

Front

What type of bond is formed when valence electrons are transferred?

Back

An ionic bond is formed when valence electrons are transferred from one atom to another.

Front

What type of bond is formed when valence electrons are shared?

Back

A covalent bond is formed when valence electrons are shared between atoms.

Front

Why is Br₂ a liquid and I₂ a solid at STP?

Back

Br₂ is a liquid at STP because it has weaker intermolecular forces compared to I₂, which has stronger intermolecular forces and is a solid at STP.

Front

What is the charge distribution in a nonpolar molecule?

Back

In a nonpolar molecule, the charge distribution is symmetrical, resulting in no net dipole moment.

Front

What happens to energy when a bond in a Cl₂ molecule is broken?

Back

Energy is absorbed when a bond in a Cl₂ molecule is broken.

Front

What is the difference between polar and nonpolar molecules?

Back

Polar molecules have an uneven distribution of charge, while nonpolar molecules have an even distribution of charge.

Front

What is an example of a polar molecule?

Back

Hydrochloric acid (HCl) is an example of a polar molecule due to its asymmetrical charge distribution.

Front

What is an example of a nonpolar molecule?

Back

Methane (CH₄) is an example of a nonpolar molecule because of its symmetrical charge distribution.