Bohr's Model of an Atom

Q.

State Bohr-Bury rules for distribution of electrons in different shells and apply them for writing electronic configuration for Z=10, 20 and 30.

Q.

What do you understand by the term electronic configuration? State Bohr- Burys scheme of electronic configuration.

Q.

Write the Bohr Bury scheme to fill the electrons in various energy levels of an atom. Using these rules, write the electron arrangement of the elements having atomic numbers $11and18$.

Q.

Match the entries of Column A with those of Column B.

Column A	Column B
(i) $\mathrm{E}=\frac{\mathrm{hc}}{\mathrm{\lambda }}$	(A) Rutherford
(ii) $\mathrm{mvr}=\frac{\mathrm{nh}}{2\mathrm{\pi }}$	(B) J.J. Thomson
(iii) $\alpha$-ray scattering experiment	(C) Max Plank
(iv) Thinly spread positively charged mass	(D) Niels Bohr

1. (i) $\to$(C); (ii) $\to$ (D) ;(iii) $\to$ (A) ;(iv) $\to$(B)

2. (i) $\to$(C) ;(ii) $\to$ (A) ;(iii) $\to$ (D); (iv) $\to$(B)

3. (i) $\to$(B); (ii) $\to$ (D) ;(iii) $\to$ (A); (iv) $\to$(C)

4. (i) $\to$(B); (ii) $\to$ (A); (iii) $\to$ (D); (iv) $\to$(C)