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How many unpaired electrons are present in Ni2+ cation (atomic number = 28):
(1) 0
(2) 2
(3) 4
(4) 6
Ans: 2
Polyglycolic acid (PGA) : It is acquired by the chain polymerisation of cyclic dimer of glycolic acid, OH-CH2-COOH.
Alkali metals belong to S-block ? why?
The atomic number of an element having the valency shell electronic configuration 4s 2 4p 6 is: (1) 35 (2) 36 (3) 37 (4) 38 Ans: 35
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i need help filling in this equation __Na+__O2= __ Na2o
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Q. What is Activation Energy? Ans. Colliding molecules which overcome the activation energy form an activated complex. In the activated complex, original bonds are partial
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