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.
Periods (rows) are the horizontal arrangements of the elements. . Elements in the same Period have the same number of occupied electron shells (energy levels) . There are seven (7) periods on the Periodic Table of the Elements. Periodic Law: The properties of the elements are periodic function of their atomic numbers. In other words, by arranging the elements in the order of increasing atomic numbers, elements with similar. properties end up in the same group.