Noun
(uncountable)
- (inorganic chemistry) Group 11 of the periodic table, comprising copper, silver, gold and roentgenium
(uncountable)
MLA Style
"copper-group." YourDictionary, n.d. Web. 15 January 2019. <https://www.yourdictionary.com/copper-group>.
APA Style
copper-group. (n.d.). Retrieved January 15th, 2019, from https://www.yourdictionary.com/copper-group