Which of the following statements regarding valence electrons is incorrect? A)Main-group elements in the same group have the same number of valence electrons. B)The group numbers of the main-group elements are the sum of the number of s and p valence electrons. C)The elements in the s-block can have up to two valence electrons. D)An element in Group IVA will have six valence electrons. E)The electron configuration for nitrogen is 1s²2s²2p³, so it has five valence electrons.

Question

Quizplus · Accepted Answer

ED) An element in Group IVA (Group 14 in the modern IUPAC designation) will have four valence electrons, not six. This is because the elements in Group IVA have the outer electron configuration of s^2p^2, totaling four valence electrons.E) The given electron configuration for nitrogen is incorrect and nonsensical with the use of "S" and "U" and "P" in such a format. The correct electron configuration for nitrogen (atomic number 7) is 1s^2 2s^2 2p^3, which indeed results in five valence electrons. However, the format provided in the choice does not accurately represent any standard notation for electron configurations.

Which of the Following Statements Regarding Valence Electrons Is Incorrect