Multiple Choice

The discovery of Balmer and Lyman series was made before _______ proposing model for structure of atom.

AThomson
BRutherford
Correct Answer
CBohr
Correct Answer
DPlanck
Correct Answer

Solution

The atoms and molecules of any one chemical species emit and absorb light at wavelengths characteristic of that species. Thus emission and absorption spectra act like fingerprints, uniquely identifying the atom or molecule that produced them. By about 1870 spectroscopy had become a powerful tool of chemical analysis and had led to the discovery of several previously unknown elements. In particular, it was, and still is, the only way to determine the chemical composition of the sun, other stars, and interstellar matter.
So discovery of Blamer and Lyman series was made before all well known atomic models.

SIMILAR QUESTIONS

Atomic Structure

When the electron jumps from $$5^{th}$$ orbit to ground state, the number of spectral lines produced in the hydrogen spectrum is:

Atomic Structure

In a hydrogen-like sample, two different types of photons $$A$$ and $$B$$ are produced by an electronic transition. Photon $$B$$ has it's wavelength in infrared region, if photon $$A$$ has more energy than $$B$$, then the photon $$A$$ may belong to the region:

Atomic Structure

Total no .of lines in Lyman series of H spectrum will be (where n = no.of orbits) :

Atomic Structure

A certain transition in $$H$$ spectrum from an excited state to ground state in one or more steps gives rise to a total of 10 lines. How many of these belong to the visible region of the spectrum?

Atomic Structure

What will happen when an electron jumps from an excited energy state to a more stable energy state in a hydrogen atom?

Atomic Structure

Estimate the difference in energy between I and II Bohr Orbit for a hydrogen atom. At what minimum at no. a transition from n=2 to n=1 energy level would result in the emission of X-rays with $$\lambda = 3.0 x 10^8m$$? Which hydrogen like species does this at no correspond to.

Atomic Structure

For emission line of atomic hydrogen from $$n_i=8$$ to $$n_f$$- the plot of wave number $$(\bar{v})$$ against $$\left(\dfrac{1}{n^2}\right)$$ will be: (The Rydberg constnt, $$R_H$$ is in wave number unit).

Atomic Structure

Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H-atom is suitable for this purpose ? $$[R_H = 1 \times 10^5 \, cm^{-1}, \, h = 6.6 \times 10^{-34} \, Js, \, c = 3 \times 10^8 ms^{-1}]$$

Atomic Structure

The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about $$9$$. The spectral series is:

Atomic Structure

Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?

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