Structure of Atom MCQ Multiple Choice Questions - Page 2 for Practice
Structure of Atom MCQ Questions for Practice
16. Iso-electronic species are
Correct Answer is: F-,O-2
17. Quantum numbers n=2,l=1 represent
Correct Answer is: 2s orbital
18. The quantum number m of a free gaseous atom is associated with
Correct Answer is: The shape of orbital
19. The value of Planks constant is 6.62 x 10-34 js. The velocity of light is 3 x 108 m/s. which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 x 1015 s ?
Correct Answer is: 5 x 10-18 3 x 107
20. For principle quantum number n=4, the number of orbitals having l=3 is
Correct Answer is: 7
21. The energy of second Bohrs orbit of hydrogen atom is -328 kj/mol. Hence the energy of fourth orbit would be
Correct Answer is: -164 kj/mol
22. The orientation of an atom is governed by
Correct Answer is: Magnetic quantum number
23. What is the maximum of electrons in an atom that can have the quantum numbers, n=4, ml=+1?
Correct Answer is: 6
24. The measurement of the electron position is associated with an uncertainty in momentum which is equal to 10-18 g cm /s. The uncertainty in electron velocity(cm/s) is; (me = 9.1 x 10-28 g)
Correct Answer is: 1011
25. Which of the following ion have electronic configuration; {Ar} 3d6?
Correct Answer is: Co+3
26. Deuterium nucleus contains
Correct Answer is: 1p+1n
27. The line spectrum of He+ ion will resemble that of
Correct Answer is: Hydrogen atom
28. The maximum number of electrons in a sub shell with, l=3 and n=4 is
Correct Answer is: 14
29. The correct set of four quantum numbers for valence electron of Rubidium(37) is
Correct Answer is: 6, 0, 0, +1/2
30. The number of electrons in 3d sub shell for element with atomic number 26 is
