'There are 11 known isotopes of this reddish metal whose symbol is Cu; 9 are radioactive'
Copper
METALS: There are 11 known isotopes of this reddish metal whose symbol is Cu; 9 are radioactive
There are 11 known isotopes of this reddish metal whose symbol is Cu; 9 are radioactive
There are 11 known isotopes of this reddish metal whose symbol is Cu; 9 are radioactive
METALS
Copper
METALS