Robert Boyle And The Noble Gases

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As we know, today there are one-hundred and eighteen elements on the periodic table of elements, but it didn’t start out like this. Robert Boyle, a scientist, discovered the element phosphorus in 1680. Also, in this year the element became known to the public. By the year of 1809, the number of elements discovered at the time was up to 47. Also, scientists began to see a pattern in the characteristics of the elements. Later in 1863, The 56 elements discovered at the time were then divided into 11 groups based on their characteristics by an english chemist named John Newlands. In the year 1869 a Russian chemist by the name of Dimitri Mendeleev started the making of the periodic table. He started by rearranging the elements in order of atomic mass. He also expected the discovery of other elements, so he decided to leave empty spaces in his table so he could add new elements later. In 1894, the noble gases were discovered by Sir William Ramsay and Lord Rayleigh. The noble gases were added to the periodic table in a group labeled 0. Eventually in 1945, Glenn Seaborg discovered and identified lanthanides and actinides. The Lanthanides were the elements with atomic numbers greater than 57 and lower than 71. The Actinides were elements greater than 92. These elements today are located underneath the periodic table (refer to figure 1). The last major change to the periodic table occurred in the 20th century due to the work of Glenn Seaborg. starting with his
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