1800-1875+(gk)

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John Dalton was born in 1766 in England. He was most renowned for his significant contribution to the modern atomic theory: Dalton is also known for his study of gasses and his explanation of the law of multiple proportions. He printed a table of relative atomic weights
 * The atoms of a given element are different from those of any other element; the atoms of different elements can be distinguished from one another by their respective relative atomic weights.
 * All atoms of a given element are identical.
 * Atoms of one element can combine with atoms of other elements to form chemical compounds; a given compound always has the same relative numbers of types of atoms.
 * Atoms cannot be created, divided into smaller particles, nor destroyed in the chemical process; a chemical reaction simply changes the way atoms are grouped together.
 * Elements are made of tiny particles called atoms.

In addition to his groundbreaking discoveries in the field of chemistry, Dalton was also the first person to explain color blindness in 1794. Dalton died in 1844 but left behind a great legacy and paved the way for countless chemists to build on the ingenious discoveries of his career. [[]]



Maxwell was born in 1831Scotland. His most significant scientific contribution was the electromagnetic theory in around 1862. Maxwell wrote, "The agreement of the results seems to show that light and magnetism are affections of the same substance, and that light is an electromagnetic disturbance propagated through the field according to electromagnetic laws".The Maxwell distribution function is commonly used in statistical mechanics in order to determine the speeds of molecules. Maxwell's research in the field of thermodynamics helped explain previously established laws in a more concise and understandable way. His work on thermodynamics led him to establish Maxwell's thermodynamic relations in 1871. Maxwell died in 1879 at the age of 48. [|http://www.gap-system.org/~history/Biographies/Maxwell.html]



Mendeleev was born 1834 in Russia. Mendeleev was a very respected and well known scientist in Europe in the late 1800s and was appointed as the Director of the Bureau of Weights and Measures in 1893 and the was an elected member of the Royal Swedish Academy of Sciences in 1905. Mendeleev was the first to arrange chemical elements in 7 different groups based on their similar characteristics. This was the basis for what we now know as the periodic table of elements. Mendeleev not only arranged all the elements that were known at the time in the table, but also predicted several new elements that had not yet been discovered. Mendeleev is also credited with introducing the metric system to Russia and the invention of the smokeless powder called pyrocollodion. Mendeleev died in 2907 at the age of 72.

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