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Chemistry µIB
2.2b Electron Subshells
10 quick questions

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10 minutes maximum!

An IB Periodic Table is required. Calculators should not be used!

1. How many orbitals are in an ‘f’ type sub-shell?
  • A.   5
  • B.   7
  • C.   10
  • D.   14
2. 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-
3. Which element has the ground state electronic configuration ending in np4 ?
  • A.   Iodine, I
  • B.   Chromium, Cr
  • C.   Selenium, Se
  • D.   Silicon, Si
4. What is the correct electronic configuration of the iron(III) ion?
  • A.   [Ar] 4s23d6
  • B.   [Ar] 3d5
  • C.   [Ar] 4s23d3
  • D.   [Ar] 4s13d10

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

        3s   3p
A [Ne]     ↑↓     ↑↓  
B [Ne]   ↑↓  
C [Ne]   ↑↓  
D [Ne]     ↑↓
6. What is the total number of electrons in s orbitals in an atom of potassium in the ground state?
  • A.   1
  • B.   4
  • C.   7
  • D.   9
7. In which block of the Periodic Table is zinc found?
  • A.   s-block
  • B.   p-block
  • C.   d-block
  • D.   f-block
8. Which element is composed of atoms whose last electron is the first to enter the 3p sub-shell?
  • A.   Gallium, Ga
  • B.   Nitrogen, N
  • C.   Scandium, Sc
  • D.   Aluminium, Al

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

        4s   3d
A [Ar]     ↑↓     ↑↓ ↑↓      
B [Ar]   ↑↓    
C [Ar]     ↑↓ ↑↓    
D [Ar]    

 

10. What is the correct electronic configuration of the copper(I) ion?
  • A.   1s22s22p63s23p63d94s2
  • B.   1s22s22p63s23p63d104s1
  • C.   1s22s22p63s23p63d10
  • D.   1s22s22p63s23p63d94s1