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balance?
Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
Diagonal relationship between Be and Al
why in f-block element electronic configuration electrons does not enter in 5d orbital (except for La,Gd,Lu)
properties of atom
The radius of electron in the first excited state of hydrogen atom is: (1) a 0 (2) 4a 0 (3) 2a 0 (4) 8a o
Q. Determine the fat content in the given sample of milk? After undertaking this activity, you will be able to: • explain the technique of determination of the total fat c
CAN BOHR MODEL EXPLAIN THE SPECTRUM LINE OH HYDROGEN ATOM?
Which of the following reduces the activation energy of a chemical reaction?
Initially 5 mol of an ideal gas with Cv,m=12.5 J K^-1 mol^-1 are at a volume of 5 dm^3 and a temperature of 300K. If the gas is heated to 373 K and the volume changed to 10 dm^3, w
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