Structure of Atom Quiz 9 – Punjab Meritorious School Preparation Portal

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Which set of quantum numbers are not possible?

n l m s

3 2 0 +1/2

2 2 1 +1/2

1 0 0 –1/2

3 2 –2 +1/2

The increasing order of the ionic radii of the given isoelectronic species is :

The velocity of particle A is 0.1 ms^–1 and that of particle B is 0.05 ms^–1. If the mass of particle B is five times that of particle A, then the ratio of de-Broglie wavelengths associated with the particles A and B is

2 : 5

3 : 4

6 : 4

5 : 2

In which one of the following pairs the two species are both isoelectronic and isotopic? (Atomic numbers : Ca = 20, Ar = 18, K = 19, Mg = 12, Fe = 26, Na = 11)

In hydrogen atomic spectrum, a series limit is found at 12186.3 cm^–1. Then it belongs to

Lyman series

Balmer series

Paschen series

Brackett series

I, II and III

II, III and IV only

I, II and IV

II and IV only

The atom/ion that has the highest number of unpaired electrons is

Two fast moving particles X and Y are associated with de Broglie wavelengths 1 nm and 4 nm respectively. If mass of X in nine times the mass of Y, the ratio of kinetic energies of X and Y would be

3 : 1

9 : 1

5 : 12

16 : 9

The wavelength (in cm) of second line in the Lyman series of hydrogen atomic spectrum is (Rydberg constant = R cm^–1)

The frequency of light emitted for the transition n = 4 to n = 2 of the He+ is equal to the transition in H atom corresponding to which of the following ?

n = 2 to n = 1

n = 3 to n = 2

n = 4 to n = 3

n = 3 to n = 1

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