True False The highest principal enegy level of period 2 elements is 2. Period 3 elements all have Period 4 elements have an six 3p electrons. inner electron configuration of [Ar]. Period 5 elements have an inner electron configuration of (Xe]. The valence electrons of group 2A elements are in an s subsheil. The highest principal energy level of period 3 elements is 4. Group 8A elements have full outer principal s and p subshells. The valence electrons of group 5A elements are in the 6 s subshell. bmit Previous Answers Request Answer

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