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- 1. Multiple ChoiceThe one or two letters used to represent elementsYield signCoefficientChemical SymbolSubscript
- 2. Multiple ChoiceElement or compound?
H2Oelementcompound - 3. Multiple ChoiceElement or compound?
O2ElementCompound - 4. Multiple ChoiceHow many elements are in C6H12O6?12324
- 5. Multiple ChoiceA physical change is?It changes the object into something differentObjects or substances undergo a change that does not change their chemical compositionit is just like a chemical reactionPaper burning
- 6. Multiple ChoiceThe smallest physical unit of an element or compound (O2 and H2O are both examples of ONE of these)Physical changeChemical SymbolYield SignMolecule
- 7. Multiple ChoiceA chemical change is?a shoe lace cut in halfdoesn't change anythingchanges the look of an objectchange that results in the formation of new chemical substances
- 8. Multiple ChoiceThe arrow symbol used in a chemical equationYield signSubscriptCoefficientChemical formula
- 9. Multiple ChoiceA way to show the number and type of elements (atoms) in a molecule or compound with a combination of symbols and numbers.MoleculeChemical formulaPhysical changeCoefficient
- 10. Multiple ChoiceThe small number that is written below the symbol and shows how many atoms of each element is present.CompoundMoleculeCoefficientSubscript
- 11. Multiple ChoiceHow many Hydrogen atoms are in H2O?zeroonetwothree
- 12. Multiple ChoiceHow many atoms of carbon (C) are in C6H12O6?361224
- 13. Multiple ChoiceWhich of the following is a compound?CoO2CCO2
- 14. Multiple ChoiceWhich of the following is NOT an element?H2OH2O2Au
- 15. Multiple ChoiceIn the equation, what are the reactants
2H2 + O2 → 2H2O2H2 + O22H2OThe element of Oxygen (O2)The element of Hydrogen (2H2) - 16. Multiple ChoiceIn the equation, what is the product
2H2 + O2 → 2H2O2H2 + O22H2OThe element of Oxygen (O2)The element of Hydrogen (2H2) - 17. Multiple ChoiceSulfuric Acid is made of two Hydrogen atoms, one Sulfur atom, and four Oxygen atoms, What is its molecular formula?2H4SOH4S2OH2SO4H2S2O4
- 18. Multiple ChoiceWhich reactant is missing from the following chemical equations?
X + PO4 → H3PO4One Hydrogen atomOne Phosphorus atomOne Oxygen atomThree Hydrogen atoms - 19. Multiple ChoiceWhat is the product for the following equation?
2Na + S2O3 →Na2S2O3NaS2O3Na2S4O3Na2S2O5 - 20. Multiple ChoiceIn the chemical equation of Photosynthesis a product formed is glucose C6H12O6. How many different elements are in glucose.243612
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