The catalyst made from the copper group displayed unexpectedly high activity in the coupling reaction.

The professor showed that the set of nth roots of unity forms a cyclic group.

The corrosion behavior of the titanium group in acidic environments has long interested materials scientists.

The manganese group includes manganese, technetium, rhenium and bohrium, which exhibit a wide range of oxidation states important in inorganic chemistry.

The group captain reviewed the mission brief and addressed the crew with quiet authority.

The advocacy group organized a peaceful march to raise awareness about the new environmental regulations.

The renormalization group provides a powerful framework for understanding how physical laws change with scale.

The lobby group organized a public forum to discuss the new environmental regulations.

The campaign group organized a petition to push for cleaner air regulations.

The interest group organized a rally to demand stronger environmental protections.