the elements are arranged in seven horizontal rows, called\n\n- groups\n- classes\n- periods\n…

the elements are arranged in seven horizontal rows, called\n\n- groups\n- classes\n- periods\n- sections\n\nquestion 6\n1 pts\nthe elements are arranged in 18 vertical columns, called\n\n- sections\n- groups\n- periods\n- classes

the elements are arranged in seven horizontal rows, called\n\n- groups\n- classes\n- periods\n- sections\n\nquestion 6\n1 pts\nthe elements are arranged in 18 vertical columns, called\n\n- sections\n- groups\n- periods\n- classes

Answer

Brief Explanations:

In the periodic table, elements are arranged in horizontal rows called periods and vertical columns called groups.

Answer:

For the first question: periods For the second question: groups