Topic V bonding/energy and intramolecular forces

In the reaction H₂ + Cl₂ → 2 HCl a bond is __ and energy is ___.

• broken, released

• formed, released

• broken, absorbed

• formed, absorbed

In which compound have electrons been transferred to sulfur?

• SO₂

• Na₂S

• SO₃

• CS₂

Which compound has the least ionic character?

• KCl

• AlCl₃

• CCl₄

• CaCl₂

Ionic solids...

• conduct electricity

• have low melting points

• are noncrystalline

• have high melting points

A substance has a high melting point and can conduct electricity in the liquid phase. What kind of bonding?

• polar covalent

• metallic

• ionic

• nonpolar covalent

Which will conduct electricity in the solid and liquid phase?

• CuCl₂

• HCl

• Cl₂

• Cu

Which compound has both ionic and covalent bonds?

• K₂SO₄

• H₂O

• KCl

• NaBr

Is this the correct dot diagram for HCl?

• no, it is missing ion charges

• no, it is missing the brackets

• yes

• no, it is missing ion charges and brackets

The total number of pairs of shared electrons on an oxygen molecule is

• 1

• 2

• 3

• 4

A compound has a low melting point and poor electrical conductivity. Which terms describe it.

• ionic, metallic

• covalent, molecular

• ionic, covalent

• molecular, metallic