In chemistry, periodic trends are specific patterns present in the periodic table that illustrate different aspects of certain elements when grouped by period and/or group. They were discovered by the Russian chemist Dimitri Mendeleev in 1863.
In chemistry, periodic trends are specific patterns present in the periodic table that illustrate different aspects of certain elements when grouped by period and/or group. They were discovered by the Russian chemist Dimitri Mendeleev in 1863.
Source: Wikipedia "Periodic trends" · CC BY-SA 4.0
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