Which Statement describes the pattern of valance electrons seen on the periodic table?

Question

A. The number of valence electrons decreases across a period from left to right, and the valence shell number decreases from top to bottom.
B. The number of valence electrons decreases across a period from left to right, and the valence shell number increases from top to bottom.
C. The number of valence electrons increases across a period from left to right, and the valence shell number decreases from top to bottom.
D. The number of valence electrons increases across a period from left to right, and the valence shell number increases from top to bottom.

GPT-4o mini · Answer

The correct statement that describes the pattern of valence electrons seen on the periodic table is:

D. The number of valence electrons increases across a period from left to right, and the valence shell number increases from top to bottom.

In detail:

As you move from left to right across a period, the number of valence electrons in the outer shell of the elements increases.
As you move down a group in the periodic table, the principal quantum number (valence shell number) increases, indicating that the electrons are found in higher energy levels.