Structure of Atoms
Get insights from 148 questions on Structure of Atoms, answered by students, alumni, and experts. You may also ask and answer any question you like about Structure of Atoms
Follow Ask QuestionQuestions
Discussions
Active Users
Followers
New answer posted
3 months agoContributor-Level 10
Limitations of Bohr's model of an atom:
(i) It could not explain spectrum of multi-electron atoms.
(ii) It could not explain Zeeman and Stark effects.
(iii) It could not explain shape of molecules.
(iv) It was not in accordance with Heisenberg's uncertainty principle.
Quantum Mechanical Model: It was developed on the basis of Heisenberg's uncertainty principle and dual behaviour of matter.
Main features of this model are given below:
(i) The energy of electrons in an atom is quantized i.e. can only have certain values.
(ii) The existence of quantized electronic energy levels is a direct result of the wave like properties of electro
New answer posted
3 months agoContributor-Level 10
Similarities:
(i) Both have spherical shape.
(ii) Both have same angular momentum.
Differences:
(i) 1s has no node while 2s has one node.
Energy of 2s is greater than that of 1s.
New question posted
3 months agoNew answer posted
3 months agoContributor-Level 10
Since ordinary white light consists of waves with all the wavelengths in the visible range, a ray of white light is spread out into a series of coloured bands called spectrum. The light of red colour which has the longest wavelength is deviated the least while the violet light, which has the shortest wavelength, is deviated the most.
The spectrum of white light, that we can see, ranges from violet at 7.50 * 1014 Hz to red at
4*1014 Hz. Such a spectrum is called a continuous spectrum (Continuous because violet merges into blue, blue into green and so on). A similar spectrum is produced when a rainbow forms in the sky.
The emission spectra
New answer posted
3 months agoContributor-Level 10
An ideal body, which emits and absorbs radiations of all frequencies uniformly, is called a black body and the radiation emitted by such a body is called black body radiation. In practice, no such body exists. Carbon black approximates fairly closely to black body. A good physical approximation to a black body is a cavity with a tiny hole, which has no other opening. Any ray entering the hole will be reflected by the cavity walls and will be eventually absorbed by the walls.
New answer posted
3 months agoContributor-Level 10
Werner Heisenberg a German physicist in 1927, stated uncertainty principle which is the consequence of dual behaviour of matter and. It states that it is impossible to determine simultaneously, the exact position and exact momentum (or velocity) of an electron.
It rules out existence of definite paths or trajectories of electrons and other similar particles.
New answer posted
3 months agoContributor-Level 10
The chemical properties of an atom are controlled by the number of electrons in the atom, which remains the same despite the change or variation in atomic masses in case the of isotopes.
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 65k Colleges
- 1.2k Exams
- 687k Reviews
- 1800k Answers