Question 1
Nickel has a face-centred cubic structure and has a density of 8.90 g cm
-3. What is its atomic radius?
◦ 125 pm
◦ 249 pm
◦ 353 pm
◦ 997 pm
Question 2
Surface tension is thought to be due to:
◦ surface area trying to increase
◦ air absorbed on the surface
◦ solute concentrated on the surface
◦ surface molecules having lower energy than bulk molecules
◦ surface molecules having higher energy than molecules in the bulk