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)It is necessary for blood coagulation helps in normal clotting of blood and prevention of haemorrhage IU=International Units, mg=miligram (1/1000 gm), μg = microgram(1/1000000 gm) Since vitamins are easily destroyed on storage or prolonged boiling, for best vitamin value, food should be eaten i..

Position of Chlorine in the Periodic Table - 1.Chlorine is placed second after fluorine in group VIIA. 2. Other members of this group are fluorine, bromine, iodine and astatine (the last member is radioactive). 3. Members of this group are called 'halogens' meaning salt producers. 4. Atom..

. They are called Lanthanides. The 7 t h period consists of elements that have atomic numbers 90 to 105. They are called Actinides. Both of them are called inner transition elements. 12. The 7 t h period is an incomplete period as it has only 23 elements. 13. Lanthanides and actinides are not accom..

Classification of Elements and Periodicity..

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When a force acts on an object and the object moves in the direction of force, we say that the force has done work on the object. If you push a book lying on a table you exert force on the book and the book moves in the direction of the force. We say that the force has done work. If yo..

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