Conversation so far:
what group is platinum in on the periodic table
Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements.
who else is in the platnium group besides platnium
The six platinum-group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum

Question: what does the group have in common
Self-contained rewrite: what does the platnium group have in common