Polarity in Chemistry

What is one of the most important classifications of molecules in chemistry?

• Polar or non-polar

• Organic or inorganic

• Solid or liquid

• Acidic or basic

What makes a molecule polar?

• Asymmetrical electron distribution

• Symmetrical electron distribution

• High electronegativity

• Low electronegativity

Which elements are considered the superstars of electro-fame?

• Carbon, hydrogen, oxygen, nitrogen, and sulfur

• Sodium, potassium, magnesium, calcium, and iron

• Oxygen, nitrogen, fluorine, chlorine, and bromine

• Aluminum, silicon, phosphorus, sulfur, and chlorine

What is the minimum difference in electronegativities required for a molecule to be considered polar?

• 1.5

• 1.0

• 0.5

• 2.0

Why does water bead up on butter?

• Water and butter have the same electronegativity

• Water is non-polar and butter is polar

• Water is polar and butter is non-polar

• Water and butter have the same geometry

What is the result of polarity in a molecule?

• A partially negative charge on one side and a partially positive charge on the other side

• A completely negative charge on one side and a completely positive charge on the other side

• A neutral charge throughout the molecule

• A fluctuating charge throughout the molecule

Tags

NGSS.HS-PS3-5

What is the term for the loose relationships between neighboring hydrogen and oxygen atoms in a water molecule?

• Hydrogen bonding

• Metallic bonding

• Ionic bonding

• Covalent bonding

Why does ice float on water?

• Ice has a lower density than water

• Ice has a larger volume due to the arrangement of hydrogen bonds

• Ice has a smaller volume due to the arrangement of hydrogen bonds

• Ice has a higher density than water

What is the specific heat capacity of water compared to common rocks?

• About ten times higher

• About five times higher

• About the same

• About five times lower

What allows water to dissolve more compounds than any other chemical on Earth?

• Its polarity

• Its high viscosity

• Its low boiling point

• Its high density

Tags

NGSS.HS-ESS2-5