Module 3- Group 7 Metals

Question 1

How does physical state and boiling point change down the group??

Answer 1

Goes from gas (fluorine) to iodine that is a solid. Boiling and melting point increase down the group due to stronger London forces ( more electrons)

Question 2

How does the colour change down the group??

Answer 2

Colours get darker, from fluorine that is yellow, chlorine that is green, then bromine is orange and iodine is purple

Question 3

How does reactivity change down the group?

Answer 3

Gets less reactive, outer electrons further away and more shielded means it’s harder to attract electron to fill outer shell

Question 4

How will chlorine react with bromide and iodide halides

Answer 4

Chlorine will displace both Br and I because it’s the most reactive. The solution will go orange when bromine is released and purple when iodine is released

Question 5

How will bromine react chloride and iodide halides

Answer 5

Won’t react with chlorine, but will displace iodine to release purple colour

Question 6

How will iodine react with chloride and iodide halides??

Answer 6

Neither will be displaced because iodine isn’t reactive enough

Question 7

Ionic equation for reaction of chlorine and bromide ions

Answer 7

Cl2+2Br- -> 2Cl- + Br2