Polar Molecules

In a covalent bond between atoms with different electronegativities, the more electronegative atom will develop ______________

• no charge

• a positive charge

• a negative charge

What is a characteristic of polar molecules?

• Symmetrical electron distribution.

• Asymmetrical electron distribution.

• Made up entirely of the same element.

• No electronegativity.

What happens to the outer electrons in a polar molecule?

• They spend more time around the less electronegative element

• They spend more time around the more electronegative element

• They are evenly distributed

• They are not affected

What are polar molecules particularly good at?

• Dissolving non-polar compounds

• Dissolving solids composed of polar or ionic compounds

• Dissolving metals

• Dissolving gases

What is the fundamental reason for the behavior of polar molecules?

• Increasing the energy of the system

• Decreasing the energy of the system

• Maintaining a constant energy level

• Increasing the temperature

Tags

NGSS.HS-PS1-2

What is one of the most important classifications of molecules?

• Whether a molecule is organic or inorganic.

• Whether a molecule is polar or non-polar.

• Whether a molecule is acidic or basic.

• Whether a molecule is large or small.

Why does butter not mix with water?

• Butter is polar and water is non-polar.

• Butter is non-polar and water is polar.

• Both are polar.

• Both are non-polar.

What phenomenon is made possible by the polarity of water?

• Magnetic bonding

• Ionic bonding

• Hydrogen bonding

• Covalent bonding

What are hybrid molecules like surfactants in soap known for?

• Having only polar areas

• Having only non-polar areas

• Having both polar and non-polar areas

• Being completely non-polar

Phosphorus has an electronegativity value of 2.1. Chlorine's electronegativity value is 3.0. What type of bond will these two elements form?

• ionic

• nonpolar covalent

• polar covalent

• metallic

Answer explanation

The difference in electronegativity between phosphorus (2.1) and chlorine (3.0) is 0.9, indicating a polar covalent bond. This occurs when electrons are shared unequally, leading to partial charges.