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Atomic Structure
q/a
| Question | Answer |
|---|---|
| Rutherford's atomic model is based on? | α-ray scattering experiment |
| What was the main discovery of Rutherford's model? | Nucleus |
| According to Bohr's model, angular momentum is? | mvr = h/2π |
| According to Bohr, energy of an orbital is given by? | E= 13.6 ×z²/n² |
| According to Bohr, radius of an orbital is given by? | r= 0.53×n²/z A° |
| According to Bohr, velocity of electron in an orbital is given by? | v= 2.18×10⁶/n m/s |
| What is Zeeman effect? | Splitting of lines in magnetic field |
| What is Stark effect? | Splitting of lines in electric field |
| Line spectra(n) was explained by? | Bohr |
| Fine spectra(l) was explained by? | Sommerfield |
| Hyperfine spectra(m) was explained by? | Lande |
| What is the series of hydrogen spectra? | Lyman, Balmer, Paschen, Brackett, Pfund, Humphrie |
| Lyman series lies in which energy region? | UV |
| Balmer series lies in which energy region? | Visible |
| Paschen series lies in which energy region? | IR |
| Practical value of Rydhberg's constant? | 109678 /cm |
| Theoretical value of Rydhberg's constant? | 109743 /cm |
| Wave-mechanical model or Quantum mechanical model was given by? | Schrodinger |
| Wave-mechanical model or Quantum mechanical model is based on? | de-Broglie's hypothesis and Heisenberg's uncertainty principle |
| No of electrons in a shell is given by? | 2n² |
| Difference in energy for consecutive shells _________ with increase in principle quantum no.? | decreases |
| Value of Principle quantum no.(n) is? | n---> 0 to ∞ |
| Value of Azimuthal quantum no. (l) is? | l---> 0 to (n-1) |
| Notions for subshells? | l=0--> s (sharp lines) l=1--> p (principle lines) l=2--> d (diffused lines) l=3--> f (fundamental lines) |
| No. of electrons in a subshell is given by? | 4l+2 |
| Value of Magnetic quantum no. (m) ranges from? | -l to +l |
| In absence of external field, the orbitals of a subshell are? | Degenerate --> subshells are of equal energy Px=Py=Pz |
| Spin quantum no. was discovered by? | Goudsmit and Uhlenbeck |
| Relative energy of Subshell is given by? | E α n+l E α n (if n+l is same) |
| Afbau's principle states that? | Subshell having lower energy is filled up first followed by higher energy subshell |
| Hund's rule states that? | In a particular subshell, there must be one electron in each orbital upto half-filled state |
| Pauli's exclusion principle states that? | no two electrons in an atom can have all four quantum numbers alike |
| For H-atom, energy of shell depends on? | n only |
| No. of nodes is given by? | n-l-1 |
| No. of nodal plane is given by? | l |
Created by:
Mushroomang
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