Playing Sports, Staying Healthy. Organized athletics are woven into the fabric of the American tradition. Millions of boys and girls participate in baseball, basketball, track and field, and other sports as part of club and/or school teams. In addition to its established health benefits, sports participation has been lauded for fostering such basic values as fair play, competitiveness and achievement.
The periodic table contains seven rows of elements. The lanthanide series belongs to row six as elements 57-71.
There are 18 columns on the periodic table. The first 2, and 13-18 are all grouped by how many valence electrons the outermost ring of an atom has. Therefore, the elements in the columns all have similar properties. There are also other ways they are grouped. They are arranged in number order.