In Module 13 of Apologia “Exploring Creation with Physical Science”, we learned that some of the elements are given initials for English words, while others are given initials for Latin words. A friend of mine, who is smart and knows a lot of Latin, gave me this chart for the English/Latin terms, along with the initials. I hope it will be useful to someone.
Updated to add:
Below is a copy of the email I got from my friend. She tells us the correct way to pronounce plumbum and adds some other interesting words you get from plum.
Hi Michelle, The “u” is short, sounding like the “u” in put. I’ve always heard the word pronounced about as you would expect (“plum” as in the fruit and “bum” as in the homeless guy). It’s a fun word. We get plumb line (lead weight on end of line), plumber (uses lead, or used to use lead pipes, also use plumb lines), to plumb the depths of (with a piece of lead) all from plumbum. Have fun with it!
Told you she was smart.