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Questions (1)
0.3975 g of an oxide of divalent metal on reduction with hydrogen gives 0.090 g of water. The atomic weight of metal is:
a) 63.5
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Answers (3)
It has 1 Calcium atom (Ca), 2 Hydrogen atoms (H), 2 carbon atoms (C) and 6 Oxygen atoms (O). Adding all you get 11.
The principal quantum number, n , describes the energy of an electron and the most probable distance of the electron from the nucleus.
The longer the wavelength the less energy it has. To go from a 4p to 2s it requires a lot more energy than going from 3p to 2s. The longer wavelength will be created by the electron transition from 3p to 2s.
