The research lab synthesized several copper acetates to test their catalytic properties.

The research team synthesized copper acetate and confirmed its identity by NMR and mass spectrometry.

The artisan polished a delicate ewer made of yellow copper for the exhibit.

The community was outraged when a bent copper was exposed for taking bribes.

The investigation revealed that several bent coppers had been accepting bribes for years.

The collector paid a fortune to acquire two scarce coppers for his 18th-century coin set.

Archaeologists discovered pottery shards that suggest the settlement dates back to the Copper Age.

The old estate was lined with towering copper beeches that glowed in the autumn light.

Early in the morning, copper finches gathered at the birdbath, their bright feathers catching the light.

The old museum displayed a line of copper captains gleaming under the spotlights.