Physics & Chemistry
Test your knowledge of Common Chemical Compounds and Their Everyday Names with a free trivia word search from thewordfind.com. Read each clue, work out the answer, then find it hidden in the letter grid — every puzzle is freshly generated, so no two plays are ever quite the same. Don't know an answer? Tap the hint button in-game to reveal the first letter, or just scan the grid — every answer is hiding in there somewhere. Between the clues and the full answer key below, this topic doubles as a quick study guide — good for a trivia night, a classroom quiz, or just picking up something new about Common Chemical Compounds and Their Everyday Names along the way.
Play This Puzzle →A few sample clues
FeS2 is a brassy, metallic-looking mineral nicknamed 'fool's gold.'
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This ion, Cl-, combines with sodium to form ordinary table seasoning.
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This hormone compound, produced in the pancreas, regulates blood sugar levels.
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This zinc oxide-based lotion is dabbed on to soothe poison ivy rash and itching.
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O3 is a gas that forms a protective layer high in Earth's stratosphere.
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All 99 questions in this topic, with answers — use it to study, or just browse. Every actual play of the puzzle only pulls a random handful of these into one game, so knowing them all here won't spoil which ones show up or where they're hidden in the grid. Play it here.
Sodium hydroxide, NaOH, is a caustic substance traditionally used in soap-making.
LYEThis weak acid, used as a mild antiseptic, eyewash ingredient and roach killer, is called _ _ _ _ _ acid.
BORICThis aromatic waxy compound from a namesake tree is used in vapor rubs and mothballs.
CAMPHORThis simple sugar compound is naturally abundant in fruit and honey.
FRUCTOSENaCl seasons food and was so prized in the ancient world that it was widely traded like money.
SALTSpinach and rhubarb leaves contain natural amounts of _ _ _ _ _ _ acid.
OXALICThis carbohydrate compound, stored in potatoes and grains, is a major energy source for plants.
STARCHSucrose (C12H22O11) is the scientific name for this sweet crystalline carbohydrate.
SUGARCalcium carbonate (CaCO3) is the soft mineral compound used in classroom writing sticks.
CHALKA buildup of _ _ _ _ acid in the joints is the underlying cause of gout.
URICThis waxy hydrocarbon compound is commonly molded into candles.
PARAFFINThis bitter plant compound gives red wine and strong tea their dry, puckering taste.
TANNINThis orange pigment compound gives carrots their color and converts to vitamin A.
CAROTENEMagnesium silicate is the softest mineral on the Mohs scale and is ground up for baby powder.
TALCThis ion, CO3 2-, is found in chalk, limestone, and antacid tablets.
CARBONATEThis protein compound found in wheat gives bread dough its stretchy texture.
GLUTENThis neurotransmitter compound plays a central role in the brain's reward and pleasure system.
DOPAMINEFirst produced in 1935, this synthetic polymer revolutionized stockings and climbing rope.
NYLONThis lead sulfide mineral was historically used as the detector crystal in early radios.
GALENAThis organic compound is the primary flavor component of real vanilla extract.
VANILLINEthylene _ _ _ _ _ _ is the compound used as engine antifreeze and in some skincare products.
GLYCOLThis solvent compound is the main ingredient in nail polish remover.
ACETONEA key acid in grapes and wine, it can crystallize into the gritty deposits called wine diamonds: _ _ _ _ _ _ _ _ acid.
TARTARICThis synthetic plastic polymer, abbreviated from polyvinyl chloride, is used in pipes and vinyl records.
PVCCalcium sulfate is a soft mineral used to make plaster and drywall, known as _ _ _ _ _ _.
GYPSUMThe NH4+ ion, common in fertilizer compounds like nitrate and sulfate salts, is known as the _ _ _ _ _ _ _ _ ion.
AMMONIUMThis colorless, odorless, toxic gas, carbon _ _ _ _ _ _ _ _, forms from incomplete fuel combustion.
MONOXIDEThis extremely hard, sparkling form of pure carbon is prized as a gemstone.
DIAMONDThis protein compound makes up roughly 80 percent of the protein in cow's milk.
CASEINMade by boiling animal collagen, this protein compound gives gummy candies their chewy texture.
GELATINThis reddish-brown compound, Fe2O3, forms when iron reacts with oxygen and moisture.
RUSTThis reddish iron oxide mineral, a major iron ore, gets its name from the Greek word for blood.
HEMATITEThis ion, SO4 2-, appears in compounds like gypsum and Epsom salts.
SULFATEThe tart acid found naturally in apples is called _ _ _ _ _ acid.
MALICThis structural protein compound is the most abundant protein in the human body.
COLLAGENThis refined petroleum product compound is used to fuel jet engines and old-fashioned lamps.
KEROSENEThis reddish-brown ore is the primary source of aluminum metal.
BAUXITEThis sodium borate compound is a classic ingredient in laundry boosters and homemade slime.
BORAXThis stimulant compound is naturally found in coffee beans and tea leaves.
CAFFEINEThis addictive compound is found naturally in tobacco plant leaves.
NICOTINELeafy greens and fortified grains are rich in _ _ _ _ _ acid, a B vitamin also called folate.
FOLICThis sugar compound found in milk can be difficult for some adults to digest.
LACTOSEH2O is the chemical formula for this life-sustaining liquid that covers most of Earth's surface.
WATERThe acid that gives vinegar its sour bite is called _ _ _ _ _ _ acid.
ACETICC2H5OH is the type of alcohol found in beer, wine, and spirits.
ETHANOLThis slick synthetic polymer coats non-stick frying pans.
TEFLONSiO2 is the main compound found in beach sand and is melted down to make glass.
SILICAThis hormone compound, released in darkness, helps regulate the sleep-wake cycle.
MELATONINPool suppliers commonly sell hydrochloric acid under the older name _ _ _ _ _ _ _ _ acid.
MURIATICThis plant-derived compound helps fruit jams and jellies thicken and set.
PECTINH2O2 is a common antiseptic that fizzes on contact with a scraped knee.
PEROXIDEA general term for potassium-rich minerals used in fertilizer, this substance was historically made by leaching wood ashes.
POTASHThis soft, slippery form of pure carbon is used as the 'lead' inside a pencil.
GRAPHITECalcium oxide (CaO) is a caustic industrial compound used in cement-making and old stage lighting.
QUICKLIMEThis flammable hydrocarbon gas, C3H8, fuels many outdoor grills.
PROPANESodium bicarbonate, NaHCO3, is a kitchen staple commonly known as baking _ _ _ _.
SODAOnce called aqua fortis, this acid, HNO3, is used in fertilizers and explosives and is called _ _ _ _ _ _ acid.
NITRICPlants absorb this gas, carbon _ _ _ _ _ _ _, during photosynthesis and release oxygen.
DIOXIDENH3 is a pungent gas widely used in cleaning products and nitrogen fertilizers.
AMMONIAThe acid found naturally in lemons and oranges is called _ _ _ _ _ _ acid.
CITRICThis naturally magnetic iron oxide mineral was used to make early compasses.
MAGNETITEThis fibrous protein compound makes up hair, nails, and the outer layer of skin.
KERATINThe iron-rich, oxygen-carrying protein in red blood cells gets half its name from a protein piece called _ _ _ _ _ _.
GLOBINThe acid that builds up in muscles during hard exercise, and sours milk, is called _ _ _ _ _ _ acid.
LACTICThis tough compound forms the exoskeletons of insects and crustaceans.
CHITINPotassium nitrate, once a key ingredient in gunpowder and cured meats, was historically called _ _ _ _ _ _ _ _ _.
SALTPETERThis compound gives chili peppers their spicy heat.
CAPSAICINVitamin C is more formally known as _ _ _ _ _ _ _ _ acid.
ASCORBICThis complex carbohydrate compound forms the rigid cell walls of plants.
CELLULOSEThis naturally occurring fossil-fuel compound mixture is refined into gasoline and diesel.
PETROLEUMThis hydrocarbon gas, C4H10, is commonly used in disposable lighters.
BUTANEThis neurotransmitter compound is often nicknamed the body's 'feel-good' chemical.
SEROTONINA dilute solution of acetic acid gives this sour condiment its sharp tang.
VINEGARFirst synthesized in 1863, this pale-yellow explosive compound's initials stand for trinitrotoluene.
TNTThis ion, NO3-, is a key component of many fertilizers and cured-meat preservatives.
NITRATEThe acid found in car batteries, H2SO4, is known as _ _ _ _ _ _ _ _ acid.
SULFURICThis sticky petroleum-based compound is used to pave roads.
ASPHALTThis pigment compound gives human skin, hair, and eyes their color.
MELANINCH4 is the primary component of the natural gas piped into many homes.
METHANEThe mild acid that gives carbonated soda water its fizz is called _ _ _ _ _ _ _ _ acid.
CARBONICThis ion, PO4 3-, is a key component of DNA, bones, and many fertilizers.
PHOSPHATEThis organic compound gives mint leaves and cough drops their cooling sensation.
MENTHOLThis crystalline form of silicon dioxide is common in jewelry and clock oscillators.
QUARTZC6H12O6 is a simple sugar that serves as the body's primary energy source.
GLUCOSEThis ion, often added to drinking water and toothpaste, helps prevent tooth decay.
FLUORIDEMagnesium sulfate crystals, dissolved in warm baths to soothe sore muscles, are called _ _ _ _ _ salts.
EPSOMFormed from limestone under heat and pressure, this calcium carbonate rock is prized for sculpture.
MARBLEThis ion, OH-, combines with sodium to form a strong base used in soap-making.
HYDROXIDEThis sedimentary rock, mostly calcium carbonate, is a key ingredient in cement.
LIMESTONEThis hormone compound, also called epinephrine, triggers the body's fight-or-flight response.
ADRENALINThis lightweight foamed polystyrene material is used in disposable cups and packing peanuts.
STYROFOAMThis chemical signal compound is released by animals to influence the behavior of others of their species.
PHEROMONEThis enzyme, traditionally taken from calf stomachs, curdles milk to make cheese.
RENNETThis bright red mercury sulfide mineral was historically ground up as a pigment.
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