When moving down a group (family) in the periodic table, the number of valence electrons
A) remains constant
B) increases by 2 then 8 then 18 then 32
C) doubles with each move
D) decreases regularly
E) changes in an unpredictable manner

Question

Quizplus · Accepted Answer

When moving down a group in the periodic table, the number of valence electrons remains constant. This is because the number of valence electrons is determined by the group number, which is the same for all elements in a particular group. For example, all elements in Group 1 (the alkali metals) have one valence electron, while all elements in Group 2 (the alkaline earth metals) have two valence electrons. This pattern continues for all groups, regardless of where they are located on the periodic table.

When Moving Down a Group (Family) in the Periodic Table