Questions generally have no periods unless there are abbreviations in them. In English, they end with a question mark. In Spanish, questions start with an inverted question mark and end with a question mark.
ie RULE: Two periods within and a comma before and after (i.e.,) He answered many questions right, i.e., he knew the answer to etesian wind. ie RULE: Two periods within and a comma before and after (i.e.,) He answered many questions right, i.e., he knew the answer to etesian wind.
When you ask a question, and it takes commas out, that is because it is looking for punctuation marks to take out. This is because we don't want questions with periods at the end. The questions mark is automatically put in. Often people put periods at the end of a sentence as a reflex and don't notice they did. They might also have forgotten that questions need questions marks, not periods. The site is trying to help out to have more questions punctuated correctly.Limitations in the WikiAnswers database do not allow certain characters to be used in questions. Also, we would be reluctant to add commas to questions, as commas would allow many different variations of a question to be asked.See Related Question.
They are all types of punctuation.
Californium hasn't "periods" inside.
3 periods
6 periods
7 periods.
there are 7 periods in the periodic table118
there are four periods in basketball
4
The time periods are called quarters and there are four of them.
The periodic table has 7 periods on it.