All the elements in period 3 have this characteristic

they all have 3 neutrons

they all have 3 protons

they all have 3 orbitals (shells)

they all have atomic masses that are a multiple of 3

(offering 98 points)

The answer would be C). All of the elements inside a period will always have the same amount of shells. Hope this helps!

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