What is the symbol for a calcium ion?

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

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

What type of matter is made of only one kind of atom