How Do the Electron-Dot Structures of Elements in the Same

Multiple Choice

How do the electron-dot structures of elements in the same group in the periodic table compare with one another?

A) The structures differ by exactly two electrons between vertically consecutive elements.
B) The number of valence shell electrons increases by one for each element from the top to the bottom of the group.
C) Elements of the same group have the same number of valence electrons.
D) The number of electrons in the electron-dot-structure will equal the group number for each element of the group.