Target: 10 Questions in 10 minutes

An IB Chemistry data booklet is helpful

1. What are the electronic configurations of the Al3+ and S2- ions?

  Al3+ S2-
A 2,8,3 2,8,6
B 2,8 2,8,8
C 2,8,6 2,8,4
D 2,8,8 2,8

2. How many orbitals are in an ‘f’ type sub-shell?

  • A.   5
  • B.   7
  • C.   10
  • D.   14
3. Which list of species all have the electronic configuration 1s22s22p63s23p6 ?
  • A.   K+, Ar, P3-
  • B.   Ne, S2-, Cl-
  • C.   Ar, Mg2+, Ca2+
  • D.   Mg2+, Na+, O2-
4. Which element has the ground state electronic configuration ending in np4 ?
  • A.   Iodine, I
  • B.   Chromium, Cr
  • C.   Selenium, Se
  • D.   Silicon, Si

5. What is the correct electronic configuration of the iron(III) ion?

  • A.   [Ar] 4s23d6
  • B.   [Ar] 3d5
  • C.   [Ar] 4s23d3
  • D.   [Ar] 4s13d10

6. Which ‘electron in boxes’ diagram is correct for the P atom?

        3s   3p
A [Ne]     up down half arrows     up down half arrows up half arrow  
B [Ne]   up down half arrows   up half arrow up half arrow up half arrow
C [Ne]   up down half arrows   up half arrow down half arrow up half arrow
D [Ne]   up half arrow   up down half arrows down half arrow up half arrow

7. What is the total number of electrons in p subshells in an atom of germanium in the ground state?

  • A. 2  
  • B. 8
  • C. 14  
  • D. 18  
8. In which block of the Periodic Table is zinc found?
  • A. s-block
  • B. p-block
  • C. d-block
  • D. f-block
9. Which of the following species has the least number of unpaired electrons?
  • A. Cu+
  • B. Mn2+
  • C. P
  • D. Al

10. Which ‘electron in boxes’ diagram is correct for the Cr atom?

        4s   3d
A [Ar]     up down half arrows     up down half arrows up down half arrows      
B [Ar]   up down half arrows   up half arrow up half arrow up half arrow up half arrow  
C [Ar]   up half arrow   up down half arrows up down half arrows up half arrow    
D [Ar]   up half arrow   up half arrow up half arrow up half arrow up half arrow up half arrow