One Letter Periodic Table Symbols - Sudden Death

Which letters of the alphabet are also the symbol of an element of the Periodic Table?
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Rade
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Last updated: October 14, 2025
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First submittedOctober 14, 2025
Times taken55,112
Average score50.0%
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Sudden Death. Clicking a wrong answer ends the quiz!
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
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15 Comments
+4
Level 62
Oct 15, 2025
This is harder than I thought
+5
Level 65
Oct 15, 2025
There is no way I got to 12 quite easily and then got stuck, thinking there were no more, guessed R, only to realise I’d forgotten about hydrogen. The only elements starting with h I could think of were holmium and hafnium somehow.
+1
Level 50
Nov 10, 2025
I missed hydrogen too
+1
Level 63
Oct 15, 2025
can I make a Spanish translation??
+1
Level 76
Oct 16, 2025
Hm tougher than anticipated, thought I would ace this.. suddenly my mind didn't want too cooperate ( it is early, but still)
+1
Level 40
Oct 16, 2025
I thought lithium was L
+1
Level 51
Nov 10, 2025
easy!
+3
Level 70
Nov 10, 2025
Haha... I picked "W" because I knew it was Tungsten, and then only moments later guessed "T" because I thought I might be Tungsten. #EarlyOnsetDementia
+1
Level 68
Nov 10, 2025
TUNGSTEN damn it
+3
Level 60
Nov 17, 2025
D and T are representations of isotopes of Hydrogen - Deuterium (D) and Tritium (T).

The question only asks for alphabets that are symbol for an element. Deuterium and Tritium are forms of elemental hydrogen.

If they are not to be accepted, the question should ask for primary isotopes of elements

+1
Level 67
Mar 9, 2026
Um what
+2
Level 51
Mar 20, 2026
"One letter PERIODIC TABLE Symbols"
+2
Level 67
Feb 25, 2026
Good quiz! I managed 13/14 (missed Y)
+1
Level 35
Mar 18, 2026
I thought radon was R lol
+1
Level 70
Mar 23, 2026
I clicked O and it marked it with a flag instead of selecting it. Hopefully if I play it again I will get 100% with credit for O.