Metals Structure and Bonding

Which of these substances can be drawn into wires?

• A

• B

• C

• D

Identify the substance as metal or other.

Substance J shatters when hit with a hammer.

• Metal

• Other

Identify the substance as metal or other.

Substance M cannot conduct electricity.

• Metal

• Other

Identify the substance as metal or other.

Substance T dissolves in water.

• Metal

• Other

Identify the substance as metal or other.

Substance W can conduct electricity when solid.

• Metal

• Other

Identify the substance as metal or other.

Substance Z is a gas at room tmperature.

• Metal

• Other

Identify the substance as metal or other.

Substance X can be hammered into a flat sheet.

• Metal

• Other

What is a consequence of the metallic bond being strong?

i. Lustre

ii. High melting point

iii. Hard

iv. malleability

• i , ii, iii and iv.

• ii only

• iii only

• ii and iii only.

Predict which of the Period 3 metals would have the strongest metallic bond.

• Na

• Mg

• Al

• They have equal strength.

Answer explanation

Al would have more delocalised electrons and metal ions with ag greater positive charge. The attraction therefore between them would be the strongest.

Also it has smaller atoms so the positive nucleii are closer to the delocalised electrons making the bond shorter and stronger.

Predict which of the Period 3 metals would have the highest conductivity.

• Na

• Mg

• Al

• They have equal conductivity.

Answer explanation

The delocalised electrons would be the charge carriers, Al being in Group III would have the largest number of delocalised electons.