Elements with a Unique First Letter

Can you name the four elements that begin with a letter that no others do?
Quiz by HinesBrothers
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Last updated: May 12, 2020
First submittedMay 12, 2020
Times taken36
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Letter
#
Element
K
36
Krypton
U
92
Uranium
V
23
Vanadium
X
54
Xenon
+2
Level 72
May 16, 2020
Oooo, trick question! I was thinking atomic symbol, not first letter, so I couldn’t figure out why potassium wasn’t working. Very sneaky!

I’m very much enjoying this series, Hines Bros!