Do valence electrons show a repeating or periodic pattern? explain.

Explanation:

It is precisely the repeating pattern of the valence electrons which is the responsible for the repeating pattern of the chemical properties: elements on a same group (column) of the periodic table have similar chemical properties because they have the same number of valence electrons.

The chemical changes (reactions) are the result of the interaction of the electrons of the elements, and, since the valence electrons are the outer most electrons, you can expect that it is the valence electrons which most influence the occurrence of the chemical reactions, which is what defines the chemical properties.

Here you have the pattern of the valence electrons shown by the representative elements on the periodic table:

Group number                  number of valence electrons

(column number)

           1                               1

           2                              2

          13                              3 (the ones digit of the column number)

          14                              4 (the ones digit of the column number)

          15                              5 (the ones digit of the column number)

          16                              6 (the ones digit of the column number)

          17                              7 (the ones digit of the column number)

          18                              8 (the ones digit of the column number)

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