Calcium's location in the periodic table of the elements. Photo Credit: Todd Helmenstine. Potassium is the 20 th element on the periodic table. It is located in period 4 and group 2.alcium's location in the periodic table of the elements. Photo Credit: Todd Helmenstine. Potassium is the 20 th element on the periodic table. It is located in period 4 and group 2.
The contagious period is the amount of time during which a sick child can give the disease to others. For major illnesses (such as hepatitis), a child will need to stay at home or in the hospital until all chance of spread has passed. For minor illnesses (like the common cold) the guidelines are less strict.
There is a short lag or incubation period (up to two days) between the time that people acquire the virus and the time they get symptoms. People may be contagious during this period.