State the modern periodic law. Name the scientist who stated this law.
State the modern periodic law. Name the scientist who stated this law.
A large number of scientists made attempts to eliminate the drawbacks of Mendeleev’s periodic table. In 1912, Moseley, an English physicist measured the frequency of X-rays emitted by a metal, when the metal was bombarded with high-speed electrons. He plotted square roots of the frequencies against atomic numbers. The plot obtained was a straight line. He found that the square root of the frequency of the prominent X-rays emitted by a metal was proportional to the atomic number and not to the atomic weight of the atom of that metal.
Moseley suggested that atomic number (Z) should be the basis for the classification of elements. Thus he gave the modern periodic law as follows:
Modern periodic law states that “the physical and chemical properties of elements are the periodic functions of their atomic numbers.”
Thus according to the modern periodic law, if elements are arranged in the increasing order of their atomic numbers the elements with similar properties are repeated at certain regular intervals.
A large number of scientists made attempts to eliminate the drawbacks of Mendeleev’s periodic table. In 1912, Moseley, an English physicist measured the frequency of X-rays emitted by a metal, when the metal was bombarded with high-speed electrons. He plotted square roots of the frequencies against atomic numbers. The plot obtained was a straight line. He found that the square root of the frequency of the prominent X-rays emitted by a metal was proportional to the atomic number and not to the atomic weight of the atom of that metal.
Moseley suggested that atomic number (Z) should be the basis for the classification of elements. Thus he gave the modern periodic law as follows:
Modern periodic law states that “the physical and chemical properties of elements are the periodic functions of their atomic numbers.”
Thus according to the modern periodic law, if elements are arranged in the increasing order of their atomic numbers the elements with similar properties are repeated at certain regular intervals.
