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Welcome to your Chemistry Quiz 4

In nitrogen atom had electronic configuration 1s7, it would have energy lower than that of normal ground state configuration 1s2 2s2 2p3 because the electrons would be closer to the nucleus. Yet 1s7 is not observed. It violates -

Identify the least stable among, the following
(Li, Be- ,b- , c-)

The wavelength associated with a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order -
(10-10 m, 10-20m, 10-30m, 10-40m)

The electronic configuration of an element is 1s2 2s2 2p6 3s2  3p6 3d5 4sThis presents-

The number of nodal planes in a P, the orbital is

The electrons identified by quantum number n and l (i) n = 4, l = 1 (ii) n= 4, l= 0 (iii) n= 3, l = 2 (iv) n = 3, l = 1 can be placed in order of increasing energy from the lowest to highest as

The first use of quantum theory to explain the structure of the atom was made by -

For a d-electron, the orbital angular momentum is –

The orbital angular momentum of an electron in a 2s orbital is

Which of the following does not characterize X-rays?