look at the bold line shaped like a staircase on the right side of the table. what does it divide?; as what can the vast majority of elements in the periodic table be classified?; describe two trends in the periodic table that go from left to right; what are the two rows at the bottom of the periodic table called; what are elements 89-102 called?; elements 89 through 103 in the seventh period are known as the series.; elements 57 to 71 on the periodic table; why f-block elements are placed separately at the bottom of the periodic table