When was copper added to the periodic table of elements?

Answer 1

Oh, dude, copper has been chilling on the Periodic Table since way back in the day. It was discovered way back in ancient times, like before Wi-Fi was even a thing. So yeah, copper has been part of the elemental squad for a looong time.

Answer 2

Copper has been mined for about 5,000 years so it's exact origin is unknown.

Since copper was a known element at the time that Dimitri Mendeleev first laid out his periodic table in 1869, it was included in that first periodic table. Other elements that were unknown at the time, like helium, were not included.

Answer 3

Since silver was a known element at the time that Dimitri Mendeleev first laid out his periodic table in 1869, it was included in that first periodic table. Other elements that were unknown at the time, like helium, were not included.

Answer 4

Copper has been known since ancient times and was not "added" to the periodic table. The periodic table of elements was developed over time, and copper's properties and atomic number were well understood before the modern periodic table was created.

Answer 5

Periods are the horizontal rows on the periodic table.

Cu is in the 4th row.

Therefore, copper is in period 4 on the periodic table.

Answer 6

Copper was known to be an element eighty years before the periodic table was developed. The very first periodic tables included copper.