Astatine (At) and tennessine (Ts) are the heaviest elements in the same vertical column of the periodic table as fluorine, chlorine, bromine, and iodine. These elements are collectively referred to as the halogens.
State the group number of the periodic table in which the halogens are found.
Practise Edexcel GCSE Chemistry Group 7 with exam-style questions for Foundation and Higher tier. 87 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.