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).
Iron (Fe) has an atomic number  of 26, so that's also how many protons â¦ it has. Since it is not an  ion, it has to have the same number of electrons as protons, so  there are also 26 electrons. To find the neutrons, you just have to  take 56-26 (number of protons) to get 30. 3 people found this useful.