Which pair of elements is most likely to have similar properties?

this is a completer guess and i no nothing about this but i thing Sg and Bh because they both have almost the exact same numbers. like i said its a guess sorry if im wrong

Hope this helps have a nice day :)

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.