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.
These elements are all unreactive and exist as gases. The horizontal (across) columns are called âperiods.â There are 7 periods on the periodic table. The bottom two rows of elements actually fit into the periodic table, but were placed below the table to create more room. The first row at the bottom fits between elements 57 and 72. These are called the âlanthanidesâ after element 57, which is lanthanum. The second row at the bottom fits between elements 89 and 104.