The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
Answer: Option C
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The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in
Answer: Option B
The National Chemical Laboratory is situated in
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
Answer: Option E
The mass number of an atom is equal to
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