Question

question 3 of 10 what do all the elements in one row of the periodic table have in common? a. they all share the same physical properties. b. they all have the same number of valence electrons. c. they all have similar chemical reactions. d. they all have the same number of core electrons

Explanation:

Elements in the same row (period) of the periodic table have the same number of electron shells. Core - electrons are those in inner shells. As elements in a period have the same number of electron shells, they have the same number of core - electrons (excluding the valence electrons). Physical properties vary across a period. Elements in the same group (column) have the same number of valence electrons and similar chemical reactions.

Answer:

D. They all have the same number of core electrons