Atomic number of which of the following elements is greater than that of Copper?
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What is used to prevent freezing of fuel in space crafts?
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period?
Removal of carbon particles from air involves the principle of
The common name of sodium tetraborate decahydrate is _____.
The percentage of nitrogen in the air is about
The Chemical formula of Methanol is _____.
Besides CO2, the other green house gas is
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