All Acronyms. CTA - Control Terminal Agency [Internet]; April 13, 2017 [cited 2017 APR 13]. Available from: https://www.allacronyms.com/CTA/Control_Terminal_Agency.
There are almost 120 known elements. For example, you are made up of billions of billions of atoms but you probably won't find more than 40 elements (types of atoms) in your body. Chemists have learned that over 95% of your body is made up of hydrogen (H), carbon (C), nitrogen, oxygen, phosphorus (P), and calcium (Ca).
A simple Google search would have sufficed. Number of elements in most of the periodic tables is 118 due to the perfect symmetry. However,the last properly named element is Copernicum which has atomic number of 112. The rest of the elements are just tentatively named. They will be properly named once there existence is properly proved.