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what is primary standard and secondary standard?
chemical laws and their verification
A substance that has a molecular structure built up chiefly or completely from a large number of similar units bonded together.
GROUP 13: ALUMINUM TO THALLIUM The substance aluminum, indium, gallium and thallium have valence electron configurations (ns) 2 (np) 1 and for the lighter elements their chemis
The expression for Bohr's radius of an atom is: (1) r= n 2 h 2 / 4 Π 2 me 4 z 2 (2) r= n 2 h 2 / 4 Π me 2 z 2 (3) r= n2h2/4 Π me 3
1. Write an easy on the classification of Phylum Protozoa, a large phylum comprising approximately 50,000 species. (10marks)
Q. What is Alloys? Metals have a property of combining with other metals to form alloys. An alloy may be defined as a solid which is formed by a combination of two or more met
Mesh size of silica gel for prep tlc
Interactive periodic table In this interactive periodic table animation you can view details of all components through clicking on it. You can select the colored through option
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