Lithium, sodium and potassium are elements in Group I of the Periodic Table. Chlorine, bromine and iodine are elements in Group VII of the Periodic Table. Which row shows the element with the lowest density in each group?
- AGroup I: lithium; Group VII: chlorine
- BGroup I: lithium; Group VII: iodine
- CGroup I: potassium; Group VII: chlorine
- DGroup I: potassium; Group VII: iodine