An element with atomic number 84 and mass number 218 loses one a-particle and two -particles in three successive stages .The resulting element will have :
at. no. 84 and mass no. 214
at no. 82 and mass no. 214
at. no. 84 and mass no. 218
at. no. 82 and mass no. 218
A.
at. no. 84 and mass no. 214
Let element is 'A'
84A218 82B214 83C214 84D214
Hence , the resulting element (D) will have at. no. 84 and mass no. 214 .
A particle is moving 3 times faster than the speed of electron. If the ratio of wavelength of particle and electron is 1.8 x 10-4 then particle is
neutron
- particle
deuteron
tritium
Assertion : Number of radial and angular nodes for 3p-orbital are 1, 1 respectively.
Reason : Number of radial and angular nodes depends only on principal quantum number.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Bohr model fails in case of multielectron pecies.
Reason : It does not mention electron-electron interactions.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
The product formed is an isobar , if there is :
1 emission
1 emission
1 and 1 emission
2 and 2 emission
When is bombarded with - particle , a radioactive isotope of phosphorus is formed .Which particle is emitted along with ?
Deuteron
Proton
Electron
Neutron
Which of the following is wrong for Bohr model?
It establishes stability of atom
It is inconsistent with Heisenberg uncertainty principle.
It explains the concept of spectral lines for hydrogen like species.
Electrons behave as particle and wave