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Which of the following set of quantum number is not valid: (1) n=1, l=2 (2) 3=2, m=1 (3) m=3,l=0 (4) 3=4,l=2
Which of the following hydrides are ionic: (1) CaH 2 (2) BaH 2 (3) SrH 2 (4) BeH 2
a. 'Hormones are chemical messengers.' Explain? b. Name the main disease caused due to lack of the vitamin and its source in each of the following: A, B 6 and E.
explain main reason for boiler corrosion ?
5 points on nickel plating
what groups comprise each block of elements(s,p.d and f blocks)in the periodic table
chemical properties of protium,deuterium and tritium..
There are 13 electrons in an element whose nucleus comprise 14 neutrons. Obtain atomic number and atomic weight of this element. If atomic weight of the isotope of above element is
resonating structure of p-nitro aniline
Why is the colour of sky blue??
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