Can someone help me asap... my science teacher assigned this puzzle for us for our 'Atoms Escape Room' My teacher told me that I have to decode the message using the decoder on the first picture I have attached below.

I still don't get it .

Please help me asap. thank you.

The diagin dilutepage 6 of 12a6a5(a)fluorine, chlorine, bromine and iodine are placed in the same group of theperiodic table.state the common name used to describe elements in this group.(i)state the group in which the elements are placed and explain whythey are placed in that group.(ii)which of the above named elements is a solid at roomtemperature and pressure?