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Periodic System Puzzle

Use the clues to figure out which letter corresponds to which element.
Quiz by
Mariusdh
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Last updated: January 9, 2026
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First submittedJune 15, 2025
Times taken9
Average score80.0%
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Letter
Element
A
He
B
Al
C
O
D
Ne
E
P
F
B
G
Ar
H
C
I
Si
J
Ca
K
K
L
H
M
Na
N
Be
O
N
P
Mg
Q
F
R
Li
S
S
T
Cl
Clue
D contains 10 protons
G has the highest boiling point of the elements in its group
An A atom has 2 neutrons
P's ionic radius is smaller than J's
The salt JQ2 exists
The elements are divided in groups as follows: BF-ADG-JNP-CS-QT-EO-HI-KLMR (not in order)
G's electrons are divided in 3 levels
G is a noble gas
Q is a stronger oxidizer than T
Q and T are gasses
Q is a halogen
C is chemically more like S than E
C's electronegativity is higher than S's
PC is the formula of an oxide
E has 5 electrons in its outer shell
O's electrons are divided in 2 levels
O is a gas, but E isn't
O atoms are lighter than E atoms
H has one proton more than F
P is an alkaline earth metal
H's oxidation number can both be +4 and -4
I is the second most common element on earth. In nature, it's only found in a bonded state
S has 6 electrons in its outer shell
N has the smallest atomic mass of the elements in its group
B's atomic radius is bigger than F's
R's ionic radius is smaller than M's
M is an alkaline metal
L is a gas
N has less electrons than F
K's core charge is greater than M's
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1 Comments
jackjack
+1
Level 70
Jul 11, 2025
Nice idea for a quiz :)

It would be a bit more challenging, if you actually had to type the answer in the specific boxes. As it is now, you could just type random elements. And you guess H when you try to type He etc.

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