What is the charge on copper in CuSO4?

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

What are the first three quantum numbers for the electrons located in subshell 2s?

In apex! a liquid heated beyond a certain temperature becomes