Incorrect! Co is the symbol for cobalt, not copper. Copper is Cu. The greatest reserves of cobalt is found in Africa, mostly Zambia and The Congo. The form found is in various ores such as cobaltite.
Radium is only found in trace amounts in uranium ore. It is not a stable element, so it cannot be found by itself like other elements (say, oxygen) can.
Nitrogen makes up approximately 78% of the Earth's atmosphere. It also forms part of the DNA molecule, so it is in every cell of the human body. Nitrates and nitrites (ions that include nitrogen) are...