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प्रश्न
What name were given by Mendeleev to the then undiscovered element scandium.
उत्तर
Scandium (Sc) was known as eka-boron.
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संबंधित प्रश्न
How could the Modern Periodic Table remove various anomalies of Mendeleev’s Periodic Table?
What property do all elements in the same column of the Periodic Table as fluorine have in common?
In the classification of the them known elements, Mendeleev was guided by two factors. What are those two factors?
Which group of elements could be placed in Mendeleev's periodic table later on, without disturbing the order? Give reason.
Describe two anomalies of Mendeleev's periodic classification of elements.
How do the properties of eka-aluminium element predicted by Mendeleev compare with the actual properties of gallium element?
In Mendeleev's periodic table, gap was not left for one of the following elements. This element is:
(a) gallium
(b) beryllium
(c) germanium
(d) scandium
State the merits of Mendeleev's classification of elements.
Eka boron : Scandium : : Eka Aluminum : _______
Two elements in the same position : demerit of Newland's octaves : : place for Isotopes : _______
