Choose the statement that is TRUE.
A)Outer electrons efficiently shield one another from nuclear charge.
B)Core electrons effectively shield outer electrons from nuclear charge.
C)Valence electrons are the most difficult of all electrons to remove.
D)Core electrons are the easiest of all electrons to remove.
E)All of the above are true.

Question

Quizplus · Accepted Answer

Core electrons, being closer to the nucleus, shield outer electrons from the nuclear charge more effectively than outer electrons shield one another (A). Valence electrons are the outermost electrons and therefore have the weakest attraction to the nucleus, making them the easiest to remove (C). Core electrons, being closer to the nucleus, have a stronger attraction and are more difficult to remove (D). Therefore, only statement B is true.

Choose the Statement That Is TRUE