Question

based on the periodic chart showing which element would you expect to have full valence shell ?
A . calcium
B . Lithium
C . Neon
D . Sulfur

Answer 1

D. sulfur because it only has one energy level and on the first one it can only hold two.

Answer 2

it is asking for a full valence shell
the definition of valence shell is the outermost shell
periodic table is arranged in a way so that the element with full valence shell is on the right-most side of the table or in group 18. these are typically called the noble gasses.
http://www.ptable.com/Images/periodic%20table.png

Answer 3

Ne in the 8th A group, so Valence=0