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Substance Formulas

Try to guess the element or compound given based only off of its symbol.
Both the IUPAC and general names are accepted
Quiz by
Polen
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Last updated: April 21, 2026
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First submittedFebruary 12, 2026
Times taken21
Average score51.3%
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Hint
Answer
CO₂
Carbon dioxide
Au
Gold
H₂O
Water
NH₄⁺
Ammonium
NH₃
Ammonia
H₂O₂
Hydrogen peroxide
NaCl
Sodium chloride
KBr
Potassium bromide
FeO
Iron (II) oxide
CH₄
Methane
C₃H₈
Propane
CO
Carbon monoxide
C₂H₆O
Ethanol
Hint
Answer
H₂S
Hydrogen sulfide
C₆H₁₂O₆
Glucose
He
Helium
CaCO₃
Calcium carbonate
Hg
Mercury
U
Uranium
OH⁻
Hydroxide
PO₄³⁻
Phosphate
I
Iodine
C₄H₁₀
Butane
SF₆
Sulfur hexafluoride
SO₄²⁻
Sulfate
Cu
Copper
Hint
Answer
SiO₂
Silicon dioxide
NaClO
Sodium hypochlorite
NO
Nitric oxide
O₃
Ozone
H₂SO₄
Sulfuric acid
C₆H₆
Benzene
C₁₂H₂₂O₁₁
Sucrose
Sb
Antimony
CN⁻
Cyanide
F₂
Fluorine
C₉H₈O₄
Acetylsalicylic acid (aspirin)
Al
Aluminum
C₈H₁₀N₄O₂
Caffeine
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