TUTORIAL 3.0: OBJECTIVE QUESTION

1. “No two electrons in an atom can have the same four quantum numbers” is a statement called Pauli exclusion principle. Bohr’s atomic postulate. Hund’s rule. Aufbau principle. 2. The electronic configuration of a ground state for Ti (Z=22) atom is 3. Which of the following electronic configuration belongs to an element that forms a simple ion with the charge of -2? 4. Which of the following represents the electronic configuration of a d-block element? ...3s23p4 ...3d54s2 ...3s23p64s2 ...3d104s24p1 5. The figure shows an orbital:The most probable set of quantum numbers for an electron to occupy the above orbital is n=2, l=1, m=2, s = +1 n=2, l=2, m=2, s = +1 n=3, l=0, m=1, s = +1 n=3, l=2, m=2, s = +1 6. Which of the following statements is correct? Each electron in an atom has a set of three quantum numbers The magnetic quantum number defines the spatial orientation of the orbital. The angular momentum quantum number may be a negative or positive number. The total number of orbitals in a shell is 2n2. 7. What is the possible quantum number(s) for the valence electrons of aluminium (Z=13) at ground state?i. n=3, l=0, m=0, s=+1 n=3, l=1, m=-1, s=+1 n=3, l=2, m=-1, s=+1 I I and II II and III I, II and III 8. Which of the following does not have paired electrons in the p orbitals of its atom? Carbon (Z=6) Oxygen (Z=8) Aluminium (Z=13) Silicon (Z=14) 9. Which of the following has the electronic configuration: 1s22s22p6 ?i. Neii. O2-iii. Na+ I I and II II and III I, II and III 10. Which of the following has one unpaired electron in its ground state?i. Naii. Aliii. Cl I I and II II and III I, II and III