Storing Potatoes. 1  1. Sort your potatoes. 2  2. Store healthy potatoes in a dark, dry place. 3  3. Keep the temperature cool.  4. Check your potatoes periodically for signs of 1  spoilage. 5. Cure your potatoes for long-term storage.
A period is a horizontal row in the periodic table. Although groups generally have more significant periodic trends, there are regions where horizontal trends are more significant than vertical group trends, such as the f-block, where the lanthanides and actinides form two substantial horizontal series of elements.
Periods are rows across the periodic table.    The old table of elements was arranged by atomic weights. The new  one is arranged by shells and subshells (s, p, d, f...). For  example, you start with the first shell that is an s-subshell (1s).