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.
Relate to the simplified periodic table above in terms of group AND period. A period begins when the next electron is the first one in the next principal level/shell and the last element in a period is when the outer level/shell is full. So, apart from H & He, a period goes from a ...,1 to a ...,8 electron arrangement.