Periodicity

Question 1

How are elements in the periodic table arranged?

Answer 1

Increasing atomic number

Question 2

How do period 2 & 3 metals’ melting points change across the period and why?

Answer 2

Increase because the metallic bonds get stronger due to: incr number of delocalised e & decr ionic radius, which leads to a higher charge density

Question 3

Does more atoms in a molecule mean stronger or weaker intermolecular forces?

Answer 3

More atoms in a molecule means stronger intermolecular forces

Question 4

Do noble gases have the highest or lowest melting points?

Answer 4

Lowest because they exist as individual atoms (monatomic), resulting in very weak intermolecular forces