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Arrange the scientists according to the...

Arrange the scientists according to their periods and achievements.
Galileo , Einstein , Newton , Nicolaus Copernicus

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Nicolaus Copernicus , Galileo , Newton , Einstein .
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Read the following paragraph and answer the questions given below: Dmitri Ivanovich Mendeleev was the first to classify elements on the basis of their fundamental property, the atomic mass, and also on the similarity of chemical properties. When Mendeleev started his work, 63 elements were known. He examined the relationship between the atomic masses of the elements and their physical and chemical properties. Among chemical properties Mendeleev concentrated on the compounds formed by the elements with oxygen and hydrogen. He selected hydrogen and oxygen as they were very reactive and formed compounds with most elements . The formulae of the hydrides and oxideswere treated as one of the basic properties of an element for its classification. He sorted out the elements with similar properties and pinned the cards together on a wall. He observed that most of the elements got a place in the periodic table and were arranged in the order of their increasing atomic masses. It was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties . On this basis Mendeleev formulated a periodic law which states that "The properties of the elements are the periodic function of their atomic masses". What is meant by periodicity according to Mendeleev?

In the Modern Periodic table, the elements are arranged in accordance with their __________ .

Which of the following statements is incorrect? Bohr gave theory of hydrogen atom and, Yukawa gave theory of nuclear forces. Law of gravitation was discovered by Newton and principle of intertia by Galileo. Laws of photoelectric effect were discovered by Einstein and laws of electromagnetic induction by Faraday. Neutron was discovered by J.J. Thomson and electron was discovered by James Chadwick.

Choose the Incorrect Pair : {:((a), "Kepler",-,"Law of period"),((b), "Galileo",-,"Motion on Inclined plane"),((c), "Newton",-,"Calculus"),((d), "Ptolemy",-,"Helicocentric theory"):}

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