Invention of Galileo Galilei that shatter the old theory and lead the way to a new one

Freud change the way society thought about and dealt with mental illness through this study.

A ball game, which uses rubber ball, played by Meso-American civilizations from earliest times.

Proposed by an English chemist John Newlands based on the periodic similarity every eight element.

He produced the periodic table based on atomic weights but arranged periodically.

Discovered the Noble gases that added further proof to the accuracy of Mendeleev's table.

He realized that arranging the elements in order of increasing atomic number rather than atomic weight gave a better fit within the “periodic table”. Who is he?

He proposed an ‘actinide hypothesis’ and published his version of the table in 1945.

One of the earliest inventions of Aztec Civilization

Major worldwide distribution channel for goods, services ,managerial and professional jobs.