Which of the following statements regarding valence electrons is incorrect?
A)The valence electrons are the electrons in the last-filled principal energy level.
B)For main-group elements, the number of valence electrons is equal to the number of electrons in the highest-energy s and p sublevels.
C)Except for helium, the Roman numeral group number corresponds to the number of valence electrons for the main-group elements.
D)The period number of an element equals the energy level of the valence electrons.
E)Elements in the p-block in the fourth period and below include their d electrons as part of their valence electron count.

Question

Quizplus · Accepted Answer

Elements in the p-block in the fourth period and below do not include their d electrons as part of their valence electron count. Valence electrons are only counted from the s and p orbitals in the outermost energy level.

Which of the Following Statements Regarding Valence Electrons Is Incorrect