Sample Paper -6

STRUCTURE OF ATOM

I. ANSWER THE FOLLOWING QUESTIONS.

1. What is the value of Planck's constant ?

2. Which rule is violated in the electronic configuration 1s0 2s2 2p4 ?

3. The wave length of a radio wave is 1.0m?

4. What is Zeeman effect?

5. What is emission spectrum?

II. ANSWER THE FOLLOWING QUESTIONS.

6. Write about the significance of the four quantum numbers?

7. Rainbow is an example of continuous spectrum explain?

8. Distinguish between Orbit and Orbital?

9. Draw the diagram of Moeller Chart?

10. Write about the three principles with example?

III.FILL IN THE BLANKS

1. If n = 1 then angular momentum quantum number (l) = ---------------

2. If a sub-shell is denoted as 2p then its magnetic quantum number values are -------------, -------------, -------------
3. Maximum number of electrons that an M-shell contain is/are ---------------
4. Splitting of spectral lines due to magnetic field is called ---------------
5. Splitting of spectral lines in the presence of electric field is called ---------------
6. Stationary orbits are introduced by ---------------
7. The value of ‘m’ for an electron spinning in clock-wise direction is ------ and for anti-clockwise direction is ------
8. Planck's equation is ---------------
9. Aufbau means ---------------
10. Speed of light in vacuum is ---------------
11. S - orbital is --------------- in shape.
12. p - orbitals are --------------- in shape.
13. d - orbital are --------------- in shape.
14. The value of Planck's constant is ---------------
15. --------------- introduced elliptical orbits.
16. The distribution of electrons in Shells, Sub-Shells and orbitals in an atom is known as --------
17. The maximum number of electrons in any shell is ---------------
18. Electrons are assigned to orbitals in order of increasing value of ---------------
19. For sub - shells with the same value of (n + l), electrons are assigned first to the sub - shell with lower --------
20. The lowest - energy orbitals are filled first. This is --------------- principle.

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