Which row shows the trends in the properties of the Group VII elements as the group is descended?
- Acolour darkens; density decreases; reactivity with halide ions increases
- Bcolour darkens; density increases; reactivity with halide ions decreases
- Ccolour lightens; density decreases; reactivity with halide ions increases
- Dcolour lightens; density increases; reactivity with halide ions decreases