Structure of Atom Questions

 

Structure of Atom

1/2 Mark Questions

1. What is the shape of s- orbital ?

Ans: Spherical shape

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

Ans: Aufbau principle

3. What is the shape of p- orbital ?

Ans: Dumbell shape

4. What is the maximum number of electrons present in K shell ?

Ans: 2

5. Which rule is violated in the electronic configuration 1s2 2s0 2p2 ?

Ans: Aufbau principle

6. What is the maximum number of electrons that can be accommodated in the L – shell of an atom ?

Ans: 8

7. Which quantum number explain about size and energy of the orbit or shell ?

Ans: Principal quantum number (n)

8. What is the shape of d- orbital ?

Ans: double dumbell shape

9. Who proposed the quantum theory ?

Ans: Max Planck

10. Who introduced the elliptical orbits ?

Ans: Sommerfeld

11. Who introduced the principal quantum number ?

Ans: Neils Bohr

12. Who introduced the magnetic quantum number ?

Ans: Lande

13. How many electrons can occupy an orbital?

Ans: 2

14. What is the maximum number of electrons in a any shell ? (OR)

 What is the maximum number of electrons in a stationary orbit (state) ?

Ans: 2n2. where ‘n’ is the principal quantum number.

15. What is the maximum number of electrons in a sub-shell ?

Ans: 2(2l+1) where l = 0, 1, 2, 3…

16. How many sub-shells are present in a principal energy shell ?

Ans: The number of sub-shells present in a principal energy shell is equal to principal quantum number 'n'.

17. Who proposed the angular momentum quantum number ?

Ans: Sommerfeld

18. Bohr’s model explains all the line spectra of which atom ?

Ans:. Hydrogen

19. Who proposed the quantum mechanical model of atom ?

Ans: Erwin Schrodinger

20. How many maximum number of electrons can be accommodated in 's' sub-shell ?

Ans: 2

21. How many maximum number of electrons can be accommodated in 'p' sub-shell ?

Ans: 6

22. How many maximum number of electrons can be accommodated in 'd' sub-shell ?

Ans: 10

23. How many maximum number of electrons can be accommodated in 'f' sub-shell ?

Ans: 14

24. For carbon (C) atom (Z=6), where does the 6th electron go?

Ans: For carbon (C) atom, the 6th electron go into the 2py orbital.

1 Mark Questions

1. Define orbital.

Ans: The space around the nucleus where the probability of finding the electron is maximum is called orbital.

2. Define electronic configuration.

Ans: The arrangement of electrons in shells, sub-shells and orbitals in an atom is called the electron configuration.

3. How many maximum number of electrons that can be accommodated in an orbital?

Ans: The maximum number of electrons that can be accommodated in an orbital is 2.

4. Define Pauli Exclusion Principle.

Ans: Pauli Exclusion Principle: According to Pauli Exclusion Principle no two electrons of the same atom can have all the four quantum numbers same.

5. Define Aufbau principle.

Ans: Aufbau principle: According to Aufbau principle the lowest-energy orbitals are filled first.

6. Define Hund’s rule.

Ans: Hund’s rule: The orbitals of equal energy (degenerate) are occupied with one electron each before pairing of electrons starts.

7. What is absorption spectrum?

Ans: The spectrum formed by the absorption of energy when an electron jumps from lower energy level to higher energy level is called absorption spectrum.

8. Draw the shape of s- orbital.

Ans:

9. What does the principal quantum number signify?

Ans: The principal quantum number (n) is related to the size and energy of the main shell.

10. Prepare a question on nlx method.

Ans: 1. What is nlx method?

2. How is nlx method useful?

11. Out of 3d and 4s, which has more (n

Ans: 1) 3d ⟹ n +l ⟹ 3 + 2 = 5; 4s ⟹

2) Hence '3d' has more (n +l) value than '4s'.

12. What is nlx method ?

Ans: The shorthand notation of electronic configuration is called nlx method.

13. What information is given by the angular momentum quantum number ?

Ans: The angular momentum quantum number is related to the shape of a particular sub-shell in the space around the nucleus.

14. What information is given by the magnetic quantum number ?

Ans: The magnetic quantum number describe the orientation of the orbital in space relative to the other orbitals in the atom.

15. What information is given by the spin qua

Ans: The spin quantum number refers to the two possible orientations of the spin of an electron (+½ or -½).

16. Define orbit.

Ans: The path of an electron which revolving around the nucleus is called an orbit.

17. Define degenerated orbitals.

Ans: Orbitals in the sub-shell belonging to the same shell possess same energy. These are called degenerated orbitals.