Screencast 5-5
14. In what group of the periodic table would an element with the following electron
configuration belong?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1 IIIA
15. A single atom of element 109 has been synthesized. Predict the electronic configuration of
this element. What element would 109 most resemble?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d7 Ir
Determine what elements are denoted by the following electron configurations:
16. 1s22s22p63s23p4 Sulfur
17. 1s22s22p63s23p64s23d104p65s1 Rubidium
18. [Xe] 6s24f145d6 Osmium
19. [Rn] 7s25f11 Fm
Determine which of the following electron configurations are not valid:
20. 1s22s22p63s23p64s24d104p5 not valid, 3d after 4s
21. 1s22s22p63s33d5 not valid, 3p after 3s
22. [Ra] 7s25f8 not valid 6d1 comes first
23. [Kr] 5s24d105p5 valid
Write the orbital diagram and stoichiometric electron configurations of the following elements
24. sodium
25. iron
26. bromine
27. barium
Write the orbital diagram and the abbreviated electron configurations of the following
elements
28. cobalt
29. silver
30. tellurium
31. radium