(A) Atoms of each element are stable and emit characteristic spectrum (R): The spectrum provides useful information about the atomic structure.
The ratio of the wave lengths of the first line in the Lyman series of the spectrum of Hydrogen atom and the first line in the Balmer series of the spectrum of He^(+) is
The ratio of the wave lengths of the first line in the Lyman series of the spectrum of Hydorgen atom and the first line in the Balmer series of the spectrum of He^(+) is
The ratio of the wave lengths of the first line in the Lyman series of the spectrum of Hydrogen atom and the first line in the Balmer series of the spectrum of He^(+) is
The manure produced from decaying the plant and animal waste is
