Mass weight of original copper rod

copper, 8930.

Explanation:

Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. to сuprum (Latin). Coper (Old English) and copper were derived from this, the later spelling first used around 1530.  muscle, and bone. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

10 years is the answer