The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
carbon
hydrogen
oxygen
nitrogen
Additional Questions
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The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is |
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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? |
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The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3 |
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The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in |
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The National Chemical Laboratory is situated in |
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Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be |
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The mass number of an atom is equal to |
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The maximum number of covalent formed by nitrogen is |
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The formula C6H5-CO-CH3 represents |
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The metal that is usually extracted from sea water is |
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