I somehow never have problems with that one. but sg stumped me for a while...(cause I knew there were two elements whose symbols started with an s but not the element name, when they werent it, couldnt think of any element starting with s that would fit for a while) Still even with the holdup 2:32 left. This quiz is a good practise to get the elements better memorized
I know it and i know it is Not spelled praesodymium, like I used to spell it, but when it comes up in quizes i often run out of time before I DO remember how to spell it.
Luckily I've managed to memorize them all