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HYDROGEN Hydrogen is the natural element in the Universe and is a major constituent of stars. It is relatively much less common on Earth but nevertheless forms nearly 1% by mass
Mention the major reason for the anomalous behaviour of lithium in Group of the periodic table. Why is the third ionization energy of manganese (At. No. =25) unexpectedly high?
Which of the following has highest melting point: (1) BaCl 2 (2) MgCl 2 (3) Cacl 2
Alf3 dot structure
characterstics of s block element
Chromium has the electronic configuration 4s 1 3d 5 rather than4s 2 , 3d 4 because: (1) 4s and 3d have the same energy (2) 4s has a higher energy than 3d (3)4s 1 is
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Q. Beneficiation of Ores? Most of the ores available in nature contain large amounts of impurities, i.e. gangue. Direct extraction of metals from the ores by metallurgical proc
what is first transition series
Energy cycle or metabolism A cell has small molecules that are denoted as micromolecules also large molecules that is denoted as macromolecules. The chemical equations of a liv
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