Periodic Table

Question 1

What are the properties of group O elements?

Answer 1

• Unreactive
• do not easily form molecules
• boiling points increase going down the group

Question 2

What are the group 7 element called and when are their properties?

Answer 2

• halogens
• non metals
• all molecules (pairs of atoms?)
• further down group, reactivity decreases
• more reactive halogen can displace a less reactive halogen from an aqueous solution of its salt