Asubstance that is made up of only one kind of atom is a(an) a. compound. b. homogeneous mixture. c. element. d. solution.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

  the mississippians were considered to be  horticulturalists, which means they were

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate