What is the formula units for sodium sulfide, sodium sulfite, anf sodium sulfate?

Look them up.

Explanation:

sulphate is SO4 (2-)

Sufide is S(-1)

Sulfite - look it up - there are several more right there you may need.

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  

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8