The only non-metal which is liquid at room temperature is
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____ is the most electropositive and ___ is the most electronegative element of the third period of modern periodic table.
Metals react with sodium hydroxide to produce ___________.
Trinitrotoluene is
Earth's crust mainly contains ______.
The elements known as primary nutrients for plants
Which element is generally No Radioactive?
Which gas is released when water is added to bleaching powder?