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प्रश्न
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
उत्तर
Moseley was the first scientist who showed that atomic number of an element is a more fundamental property than its atomic mass.
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संबंधित प्रश्न
State modern periodic law.
Name the scientist who prepared modern periodic table.
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in modern periodic table are arranged on the basis of increasing atomic masses.
(b) Elements in Mendeleev's periodic table are arranged on the basis of increasing atomic numbers.
(c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
State the number of elements in Period 1 of the Periodic Table.
To the left of the zig-zag line in the periodic table are the metal elements.
The K and L shells of the elements Na and Mg contain electrons.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
Define groups of modern periodic table.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
