Question

missed this? watch kcv: the periodic law and the periodic table; read section 4.6. you can clic
part a
which elements are not main - group elements?
check all that apply.
mo
pb
br
al
cs
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Explanation:

Main-group elements are in groups 1-2 and 13-18 of the periodic table. Mo (molybdenum) is in group 6, a transition metal (not main-group). Pb (group 14), Br (group 17), Al (group 13), and Cs (group 1) are all main-group elements.

Answer:

Mo