CHO 451 Lecture Notes - Lecture 3: Gallium, Fluorine, Effective Nuclear Charge

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How to find position of element in periodic table. Atomic size f- "cnneatgalfifegend non - metallic. Skep : story at the -464t 2 ! Hi, ert efet he discuss tk for scientists e tht tht alte mps. Tt g elements tf classify that i iit i. Johann wolfgang dobereiner tried to arrange the elements with. He identified some groups having three elements each , groups. When the three elements in a triad were written in the order of increasing atomic masses , the atomic mass of the middle element was roughly the average of the atomic masses of the. Avg . of first and third ca sr ba. 40 other two elements . so he called these. All the ele me merits discovered at that time could not be classified into triads. Dobereiner uncle tf tail efttp but newlands " chacha f shit data ht. , john newlands arranged the known elements in the order of increasing atomic masses.