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Heavy isotope of oxygen
Mole number of oxygen atoms
Mole number of hydrogen atoms
Heavy isotope of hydrogen
Heavy water is used as a coolant in nuclear reactors Heavy water is
Helium gas is used in gas balloons instead of hydrogen gas because it is
Helium is added to the oxygen supply of deep sea divers as it is
Higher concentration of nitrogen dioxide in atmosphere air causes
Highest percentage of carbon is found in which form of coal?
Highly toxic gas which causes headache, visual difficulty, paralysis and even death is
How many carbon and hydrogen atoms are there in Propane, respectively?
How many electrons are there in a Hydrogen atom?
How many electrons are there in Na+
How many groups and periods are present in the Modern Periodic Table?