Hello, /sci/, I'm not sure if this is the best place to post this since it's relatively trivial, but it's been bothering me for a while now.

A while ago, I has a science assignment where I had to arrange fictional elements by their atomic range (or something like that). The complete assignment is shown in the picture. The important thing is that, for extra credit, he told us to try and find the hidden codeword encrypted into the letters.

I have tried for HOURS and I could not find it. Could you guys give me a hand?