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.
How many periods are in the periodic table? Each horizontal row of elements in the Periodic Table is known as a period. The Periodic Table consists of seven periods, from Period 1 to Period 7. Table shows the changes in the proton numbers and number of valence electrons when going across Period 2. Element in Period 2