are possible? p , s , p and f . Using s , p , d notations, describe the orbital with the following quantum numbers. (a) n = , l = ; (b) n = ; l = (c) n = ; l = ; (d) n = ; l = .
. Explain, giving reasons, which of the following sets of quantum numbers are not possible. (a) n = , l = , m l = , m s = + ½ (b) n = , l = , ml = , ms = – ½ (c) n = , l = , m l = , m s = + ½ (d) n = , l = , m l = , m s = – ½ (e) n = , l = , ml = – , ms = + ½ (f) n = , l = , m l = , m s = + ½ . How many electrons in an atom may have the following quantum numbers?
(a) n = , m s = – ½ (b) n = , l = . Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the orbit. . What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition n = to n = of He + spectrum ?
. Calculate the energy required for the process He + (g) He + (g) + e – The ionization energy for the H atom in the ground state is . × – J atom – . If the diameter of a carbon atom is .
nm, calculate the number of carbon atoms which can be placed side by side in a straight line across length of scale of length cm long. . × atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is .
cm. . The diameter