Question

question 20 of 28 which of the following is true of elements in the same group or family? a. they have similar atomic masses. b. their atomic numbers are close together. c. they are likely to have similar chemical properties. d. they are likely to have the same number of electron orbit shells.

Explanation:

Elements in the same group/family of the periodic table have the same number of valence electrons, leading to similar chemical properties. Atomic masses and atomic numbers vary significantly within a group, and electron orbit shells increase down a group.

Answer:

C. They are likely to have similar chemical properties.