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Our world consists of various elements, which are arranged in the periodic table according to atomic numbers. Russian chemist Dmitri Mendeleev devised the periodic table in 1869. Since then, more than 170 versions of periodic tables have been proposed. In summary, the short form was proposed by Mendeleev, the long form by Werner, the specialty table by Poltar, the planar spiral table and round table by Dammenkov, and the dimensional periodic table represented by Lacey's taper column.
What element are you on the periodic table? Test yourself and see! Answer the following questions according to your own true situation and if the available answers do not completely match, choose the one that is closest.
The United States
Jeju Island, Korea
The Amazon rainforest, South America
Which of the following tunes is most likely to stick in your head all day? (Click on the letter to listen.)
Which tune is most difficult for you to enjoy listening to? (click on the letter to listen)