Is Tungsten magnetic? I dropped my boyfriends ring (made of Tungsten) down the place in the doorframe where the door closes, not knowing there was actually a hole there.
Use commas to separate things in a list or series. If you have a series of three or more items, use commas to separate each item. Do not place commas before or after the list or series. Do not use commas when all the items in a series are linked by and, or, or nor.
Using Commas. 1. Use a comma to indicate a break or pause within a sentence. The comma (,) is a very versatile punctuation mark. There are dozens of situations that might require the use of a comma. One frequent case is the appositive -- a break within a sentence that supplements and adds information to the subject.