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HW for Elass-X, On what dasis did Mandeleev, arrange the elements in his reniade, table, 2) Name the Russian chemist who, Said that the proberties of elements, cre a periodie function their, atomic masses ?, Periods are te horizontal renis of, elements, true or false ?, ) Name the Scientists who gare, the Law f octaves in th early, classification f elem ents ., 5) A, B, C are the elements of a, Dobereiner's tried. If the atomic, mass of A is 7 and The of cs, 39. Whot shonld de the atomic, mass f BY, This Sta ement is