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| | The Periodic Table |
 | | In 1864, the English chemist John Alexander Reina Newlands (1837-1898) arranged the known elements in order of increasing atomic weights, and noted that this arrangement also placed the properties of the elements into at least a partial order. |
 | | Newlands called this the law of octaves (there are seven notes to an octave in music, the eighth note being almost a duplicate of the first note and beginning a new octave.) Unfortunately, while some of the rows in his table did contain similar elements, other rows contained widely dissimilar elements. |
 | | Knowledge concerning them began with the work of the English physicist John William Strutt, Lord Rayleigh (1842-1919), who, in the 1880's, was working out with great care the atomic weights of oxygen, hydrogen, and nitrogen. |
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