Unit 5 Review

Front

What does the direction of a dipole arrow indicate in a bond?

Back

The direction of the dipole arrow indicates that the atom at the head of the arrow is more electronegative than the atom at the tail.

Front

What is the chemical formula for phosphorus trifluoride?

Back

PF3

Front

Which of the following is a covalent compound: CO2, NaCl, or MgO?

Back

CO2 is a covalent compound.

Front

Which bond is more polar: H-F or H-Cl?

Back

H-F is more polar than H-Cl.

Front

What is the correct Lewis dot structure for the molecule F2?

Back

The correct Lewis dot structure for F2 shows two fluorine atoms sharing a pair of electrons.

Front

Define electronegativity.

Back

Electronegativity is the ability of an atom to attract electrons in a chemical bond.

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of bond where electrons are shared unequally between two atoms, resulting in a dipole moment.

Front

How do you determine the polarity of a bond?

Back

The polarity of a bond can be determined by the difference in electronegativity between the two atoms involved in the bond.

Front

What is the significance of Lewis dot structures?

Back

Lewis dot structures represent the valence electrons of atoms and show how they are arranged in molecules.

Front

What is the general rule for determining if a bond is ionic or covalent?

Back

If the difference in electronegativity between two atoms is greater than 1.7, the bond is typically ionic; if it is less, the bond is covalent.