Unit 9 Polar Bonds and Molecules

Front

What is a polar bond?

Back

A polar bond is a type of covalent bond where the electrons are not shared equally between the two atoms, resulting in a molecule with a partial positive charge on one end and a partial negative charge on the other.

Front

What is a nonpolar bond?

Back

A nonpolar bond is a type of covalent bond where the electrons are shared equally between the two atoms, resulting in no charge separation.

Front

What determines the polarity of a molecule?

Back

The polarity of a molecule is determined by the difference in electronegativity between the atoms involved in the bond and the molecular geometry.

Front

What is electronegativity?

Back

Electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.

Front

What is the electronegativity difference that typically indicates a polar covalent bond?

Back

A difference in electronegativity of 0.4 to 1.7 typically indicates a polar covalent bond.

Front

What is the electronegativity difference that typically indicates an ionic bond?

Back

A difference in electronegativity greater than 1.7 typically indicates an ionic bond.

Front

What is the molecular geometry of H2S?

Back

H2S has a bent molecular geometry due to the presence of lone pairs on the sulfur atom.

Front

Is Br-Br a polar or nonpolar molecule?

Back

Br-Br is a nonpolar molecule because it consists of two identical atoms sharing electrons equally.

Front

What type of bond is formed between Be and F?

Back

The bond between Be and F is ionic due to the large difference in electronegativity.

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of bond where electrons are shared unequally, resulting in a molecule with partial charges.