What are "representative elements"? A. Elements in the short columns of the periodic table
B. Elements in the same rowof the periodic table
C. Elements that share the same properties on the periodic table
D. Elements in the tall columns of the periodic table

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the lowest number energy level where a d sublevel is found

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments