describe what the periods and groups on the periodic table are, how they are different, and what they tell us about an atoms structure.

Explanation:

Periods and groups describes the arrangement of elements on the periodic table using the atomic number of each of the given elements.

Elements in the same period have the same number of energy levels or electronic shell.

The period of an element is an indicator of the energy levels in an atom. The groups precisely tells us the number of valence electrons in the atom.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them