The year Russian chemist Dmitri Mendeleev created the first periodic table.
Numbers in the News: The Periodic Table
This year marks the 150th anniversary of the periodic table.
1869
63 vs. 118
Number of elements on the original periodic table versus number on it today.
77%
The percentage of elements on the table found in nature. Scientists created the rest in a lab.
24
Number of letters of the alphabet used at least once in elements’ symbols on the table. No elements contain Q or J.
THINK ABOUT IT: Can you identify one element from the periodic table named after a place, just by looking at its name? An astronomical body? A mythical figure?
SOURCES: AMERICAN CHEMICAL SOCIETY, COMPOUND INTEREST
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