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प्रश्न
Why could no fixed position be given to hydrogen in Mendeleev's periodic table?
उत्तर
Mendeleev's periodic law could not assign a fixed position to hydrogen in the periodic table because hydrogen resembled both alkali metals (Group 1) and halogens (Group 17) in some of its properties. Hydrogen reacts with metals to form ionic compounds called hydrides and also with non-metals to form covalent compounds.
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संबंधित प्रश्न
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
What property do all elements in the same column of the Periodic Table as boron have in common?
What property do all elements in the same column of the Periodic Table as fluorine have in common?
State the merits of Mendeleev's classification of elements.
What name were given by Mendeleev to the then undiscovered element scandium.
What name were given by Mendeleev to the then undiscovered element gallium?
Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in his periodic table?
The elements from the zero group are called _______.
Eka boron : Scandium : : Eka Aluminum : _______
Describe the merits of Mendeleev’s periodic table?
