Chemical Elements With Unique Endings

Can you name every element on the periodic table that has a unique ending two letters? No -iums here!
No, my source is not the carbon-copy Sporcle Quiz. I found that after making this quiz. It was my own thinking that someone else just so happened to have done on a different website three years ago
Quiz by Jarl5
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Last updated: July 5, 2017
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First submittedJuly 5, 2017
Times taken56
Average score69.2%
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Ending
Answer
-ad
Lead
-el
Nickel
-ic
Arsenic
-in
Tin
-ld
Gold
-lt
Cobalt
-nc
Zinc
Ending
Answer
-ny
Antimony
-ry
Mercury
-se
Manganese
-th
Bismuth
-ur
Sulfur
-us
Phosphorus
+1
Level 35
Feb 10, 2018
Iron?