CH111 Lecture Notes - Lecture 2: Julius Lothar Meyer, John Newlands (Chemist), Scandium
25 Dec 2018
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6. 1 the development of the modern periodic table. Compile a table of the scientists responsible for the development of the periodic table. Developed octave rule, which ordered elements by mass (noticed a pattern for every 8th element) Arranged first true periodic table (with blank spaces for. & lothar meyer (though not as acknowledged) unknown elements) in order of increasing mass by noting trends in properties of elements. (predicted properties of yet to be discovered scandium, gallium, and germanium) However, the table was not in correct order. Addressed ^ problem of by arranging elements in order of increasing atomic # (# of protons) instead of atomic mass. The statement that there is a periodic repetition of chemical and physical properties of elements when they are arranged by increasing atomic number. The columns on the periodic table; also called families. 8 a groups known as representative elements. 8 b groups known as transition elements.
