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 in the universe (anything that has substance) is made of small components called atoms. Every atom is made up of tiny particles called electrons protons and neutrons. Electrons repel other electrons, but are attracted to protons. Protons repel one another, but are attracted to electrons.