Question

Copper (__) is an element on the periodic table.

CU (both letters capitalized)
Cu (first letter capitalized)
cU (second letter capitalized)
cu (both letters lowercase)​

Answer 1

Cu

Step-by-step explanation:

Because there are several elements with the same first letter, it is often necessary to add the second letter to the symbol. ... The first letter of the chemical symbol is always capitalized. If the symbol has two letters, the second letter is always lowercase.

Answer 2

Cu

Step-by-step explanation:

The second letter of an element is always lowercase and the first letter is always capital.