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).
There are 118 different types of atoms, but only a handful of these different types are actually important in our everyday lives. In fact, about 97% of the human body is made out of only six elements â carbon, hydrogen, nitrogen, oxygen, phosphorous and sulfur, also nicknamed the âCHNOPSâ elements.