DMITRI IVANOVICH MENDELEEV
( 1834 - 1907 )
Mendeleev was a Russian Chemist who was the first to propose that the seemingly different chemical elements can be sorted out according to certain similarities in their properties. The arrangement he proposed is called the PERIODIC TABLE. His table proved to be a unifying principle in chemistry and led to the discovery of many new chemical elements.
Mendeleev studied chemistry at the university of St.Petersburg. He became a professor of general chemistry in 1867 after he received his Ph.D in 1865. He participated in the early development of oil fields in Southern Russia. He went to USA in 1876 and studied the petroleum industry there. Then he returned to St.Petersburg and resigned his job at university in 1890 in order to support for a group of student activists in their unrest against conservative academic policies.
Mendeleev wore for most of his life a large and baggy jacket without a belt, made of dark grey cloth, that too being his own creation.
In his table Mendeleev found that if elements are arranged in order of increasing atomic weights, elements with similar physical and chemical Properties occur at periodic intervals.
In the periodic table Mendeleev ordered the elements according to their atomic weights. It is an arrangement of the chemical elements in order of increasing atomic number into vertical columns and horizontal rows in such a way that elements with similar properties occupy the same columns. The vertical columns are known as groups and the horizontal rows are known as periods. The groups in the modern periodic table are numbered from 1 to 18 rather I to VIII and 0 in the old classification.
Mendeleevium is a transuranic chemical element belonging to group 3 (a) Old classification III (b) Its atomic number is 101. This element has been named after Mendeleev.
Mendeleev studied chemistry at the university of St.Petersburg. He became a professor of general chemistry in 1867 after he received his Ph.D in 1865. He participated in the early development of oil fields in Southern Russia. He went to USA in 1876 and studied the petroleum industry there. Then he returned to St.Petersburg and resigned his job at university in 1890 in order to support for a group of student activists in their unrest against conservative academic policies.
Mendeleev wore for most of his life a large and baggy jacket without a belt, made of dark grey cloth, that too being his own creation.
In his table Mendeleev found that if elements are arranged in order of increasing atomic weights, elements with similar physical and chemical Properties occur at periodic intervals.
In the periodic table Mendeleev ordered the elements according to their atomic weights. It is an arrangement of the chemical elements in order of increasing atomic number into vertical columns and horizontal rows in such a way that elements with similar properties occupy the same columns. The vertical columns are known as groups and the horizontal rows are known as periods. The groups in the modern periodic table are numbered from 1 to 18 rather I to VIII and 0 in the old classification.
Mendeleevium is a transuranic chemical element belonging to group 3 (a) Old classification III (b) Its atomic number is 101. This element has been named after Mendeleev.
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