Elements in the same group/family of the periodic table are similar in what way? a. they are all metals b. they are all nonmetals c. they have a full outer shell of electrons. eliminate d. they have the same number of valence electrons.

D. They have the same number of valence electrons

Explanation:

The periodic table arranges elements into rows known as periods and columns known as groups or families. Elements in the same group share similar chemical properties. Additionally, they have the same number of valence electrons. For example, elements in group I have one valence electrons while those in group II have two valence electrons.Elements in the same period share similar features such as having the same number of energy levels. For example elements in period 4 have four energy levels.

D. most models represent a real world object in a simpler way