What do they all mean? And what is the table actually used for? Dr. Tim: So this is the periodic table and each letter on it represents a different element. We call these letters symbols.

such as double-letter strings or symbols. Although creating all 26 letters of the alphabet is a lengthy process, its ...

Why? “I like the letter X,” Musk posted on the newly branded site. If X ever goes public, Musk may have a shot at getting the ...