It's these two numbers, 20 and 13, that are used to make up the Tzolk'in calendar, the first calendar used by the Mayans. 1  1. 2  2. 3  3. 4  4. â¦. 5  5. 6.  NEXT.
Making the world better, one answer at a time. the nucleus is made up ofneutrons and protons. on the outside of the nucleus is the electrons. the nucleus is made up ofneutrons and protons. <br/>on the outside of the nucleus is the electrons.
All Matter is made of Molecules. Molecules are made of Atoms. Atoms are made of Protons, Neutrons, and Electrons. Protons, Newtons and Electrons are made of Quarks. And some physicists believe that Quarks are made of Strings.