We put the period after the word Mr because it's an abbreviation for Mister.
You put a period after all of those in the states, however, the British system requires no period after such abbreviations, Mr Mrs Ms .
Yes, i.e. Mr. , Mrs.
Yes you should always use a period.
after Mr you need to put period and then use space then write name For Example,Mr.Tom
No, but you need to capitalize it. You put a period after Mr. because it is short for Mister. You put a period after Mrs. because it is short for Missus. But Miss is already a short word so doesn't need an abbreviation.
Yes you should always do that
Yes, the general rule is that where a word is abbreviated it is followed by a full stop to indicate this. For instance Mr. is an abbreviation of Mister.
No, "Mr" does not require a period after it. It is considered an abbreviation, and in formal writing, the period is typically omitted.
Yes. Period. Yes, you do.
A dot is used to express missing letters but is not needed if the abbreviation includes the last letter of the word e.g. Mrs, Mr, Dr etc. Therefore Co. needs a dot but Ltd does not.
Yes because it is an abbreviation eg Mr. Lawrance, Mr. President
You put a period at the end of the sentence to indicate that the sentence has ended.