Correction: United Nations-Periodic Table story

PARIS — In a story Jan. 30 about the periodic table, The Associated Press erroneously reported the year it was first published. The periodic table was first published in 1869, not 1969.

A corrected version of the story is below:

UNESCO celebrates 150 years of chemistry's periodic table

The periodic table of chemical elements is having its 150th birthday, and U.N. scientific agency is holding a year of events to celebrate

PARIS — The periodic table of chemical elements is having its 150th birthday, and the U.N. scientific agency is holding a year of events to celebrate.

Anyone who has studied chemistry will recognize the table, which organizes all chemical elements by the number of protons in a given atom and other properties. Russian scientist Dmitry Mendeleev published the first such table in 1869.

The U.N. Education, Scientific and Cultural Organization kicked off the "International Year of the Period Table of Chemical Elements" on Tuesday with a ceremony including a Nobel chemistry laureate and Russia's science minister, among other dignitaries.

Other activities UNESCO is organizing this year include an online competition to test high school students' knowledge of the table, and scientific experiments brought to schools around the world.

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