What is the number of electrons in ₁₉ K with quantum numbers n=3 and l=0?

1. Two (2)

2. One (1)

3. Four (4)

4. Three (3)

The number of orbitals that are possible at the L-energy level is

1. 2

2. 4

3. 6

4. 1

The maximum wavelength in the Lyman series of He⁺ ion is-

1. 3R

2. 1/3R

3. 1/R

4. 2R

 When an electron jumps from n=5 to n=1 in a hydrogen atom, the number of spectral lines obtained is 

The transition in the He⁺ ion in the balmer series that would have the same wave number as the first Lyman line in the hydrogen spectrum is-

Which of the following has greater number of electrons than neutrons?

1. Al³⁺

2. O^2-

3. F^-

4. C

What is the correct family and electronic configuration for element Z = 114?

1. Halogen family, [Rn]5f¹⁴6d¹⁰7s²7p⁵

2. Carbon family, [Rn]5f¹⁴6d¹⁰7s²7p²

3. Oxygen family, [Rn]5f¹⁴6d¹⁰7s²7p⁴

4. Nitrogen family, [Rn]5f¹⁴6d¹⁰7s²7p⁶

The number of electrons that can be fit into the orbital for which n = 3 and l = 1, is:

1. Two (2)

2. Six (6)

3. Ten  (10)

4. Fourteen (14)

The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64) and Tb (Tb Atomic no. 65) are

1. [Xe]4f⁶5d¹6s², [Xe]4f⁷5d¹6s² and [Xe]4f⁹6s²

2. [Xe]4f⁶5d¹6s², [Xe]4f⁷5d¹6s² and [Xe]4f⁸5d¹6s²

3. [Xe]4f⁷6s², [Xe]4f⁷5d¹6s² and [Xe]4f⁹6s²

4. [Xe]4f⁷6s², [Xe]4f⁸6s² and [Xe]4f⁸5d¹6s² 

The magnetic moment of 2.84 BM can be shown by:  

(At. no. Ni = 28, Ti = 22, Cr = 24, Co = 27)

1. Ni²⁺

2. Ti³⁺

3. Cr³⁺

4. Co²⁺