no u dont ned any.
It is not really wrong to use periods when abbreviating South Carolina S.C.; in fact, most folks over 50 can remember when it was preferred. But today adding the periods is considered old style. The US Postal Service (USPS) abbreviation for each of the United States, districts, territories, and possessions dispensed with the periods.
Yes P.E. it's an abbreviation. But check the style manual that you are to use for your writing. Most schools and corporations have one designated, or have created their own, that specifies the correct method for abbreviations.
4 periods are used when an omission ends a sentence.
No, there should not be two periods when "am" is at the end of a sentence. Only one period is needed to end the sentence.
Strictly you should: U.K. However it's often seen without, even in quite official situations.
Four periods at the end of a sentence are called an ellipsis, used to indicate an omission in text.
No, it is not necessary to end a sentence with two periods if the sentence ends with an abbreviation like "M.D." One period at the end of the abbreviation is sufficient for proper punctuation.
no it doesn't because it is a punctuation not a word
at the end of a sentence
They are used to mark the end of a sentence.
there are 5 minutes in between periods.
To answer your question. You will have to put TWO periods.