Avyan Chethan (D.O.B 08.02.2015) from Livermore, California, USA. Avyan, who is 5 years old, can recite all the 118 elements and has a good understanding of the periodic table. He knows the concepts of atom structure, what they are made of, how the electrons are distributed in shells in an atom. Avyan even knows the 194 countries that are recognized by UN.