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- 1. Multiple ChoiceWater has ten protons. Neon has ten protons. Water is a liquid at room temperature and neon is a gas at room temperature. Which of the following statements below is true?gases react to temperature in a different waythe total number of electrons of water is different than in neonthe arrangement of the protons and neutrons is different for each substancethese two elements are found in different periods on the Periodic Table of the Elements
- 2. Multiple ChoiceWhich of these elements is most likely to have chemical properties similar of those of Calcium?MagnesiumNeonPotassiumZirconium
- 3. Multiple ChoiceWhich is an example of a compound?PizzaWaterGoldSoil
- 4. Multiple Choice
Which of the following atom diagrams accurately represents a mixture?ABCD - 5. Multiple ChoiceSea salt for use in cooking is extracted from ocean water by means of ___________.filtering with papersiftingevaporationcondensation
- 6. Multiple ChoiceWhich is the best example of a homogeneous mixture?A brick of GoldWaterMountain DewHelium in a balloon
- 7. Multiple ChoiceC6H12O6 is a compound. How many atoms make up this compound?6121824
- 8. Multiple ChoiceWhich of the following illustrations best represents a heterogeneous mixture?1st2nd3rd4th
- 9. Multiple ChoiceWhich of the following ordered pairs of elements shows an increase in atomic number, but a decrease in average atomic mass?Ag to PdCo to NiGe to SnCr to Mo
- 10. Multiple ChoiceOn the Periodic Table, elements are in the same group because they have the same number of ____________.ProtonsNeutronsValence ElectronsOrbitals
- 11. Multiple ChoiceWhich elements in the periodic table are least likely to combine with other elements?HalogensNoble GasesAlkaline Earth MetalsTransition Metals
- 12. Multiple ChoiceWhich of the following is the atomic number of a noble gas?19243236
- 13. Multiple ChoiceHow many neutrons does the the element with the atomic number of 3 have?3754
- 14. Multiple ChoiceWhich of the following statements is true?The least reactive elements are in the far left column.Elements at the top of a column have more protons than elements at the bottom of the column.Elements on the left side of a row always have higher atomic mass than elements on the right side of that row.Elements along the stairstep have some properties of metals and some properties of nonmetals
- 15. Multiple ChoiceMendeleev's Periodic Table was initially arranged by _______.Groups/FamiliesAtomic NumberAtomic MassReactivity
- 16. Multiple ChoiceWhich of the following accurately represents the subatomic particles of an atom, along with their location and their appropriate charges?Neutron (Negative) - NucleusElectron (Positive) - Electron CloudNeutron (Neutral) - NucleusProton (Negative) - Electron Cloud
- 17. Multiple ChoiceDry ice undergoing sublimation is an example of a _____ change proven due to the evidence of a _______Chemical; Formation of a precipitatePhysical; State ChangeChemical; Temperature ChangePhysical; Color Change
- 18. Multiple ChoiceWhich of the following is considered a chemical property?LusterDensityColorReactivity
- 19. Multiple ChoiceHydrogen and oxygen combine to form water. Which of the following shows the correct2H2 + O2 → 2H2OH2 + HO2 → H2O2C + O2 → CO2H2O → H2 + O2
- 20. Multiple ChoiceYour litmus paper will turn red in the presence of an acid. The pH of a bowl of fruit cocktail is 3.8. Cuttlefish has a pH of 6.3. Fresh eggs have a pH of 7.4. Which of these substances will turn litmus paper red?Eggs OnlyEggs and CuttlefishFruit cocktail and CuttlefishThe paper will react to all three
- 21. Multiple ChoiceAn exothermic reaction gives out energy to its surroundings. The energy needed for the reaction to occur is less than the total energy released or given off. Which of the following chemical equations represents an exothermic reaction?2 HCl + 2 Na → 2 NaCl + HC₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energyNH2CONH2 + H2O + heat → 2NH3 + CO26CO2 + 6H2O + light energy → C6H12O6 + 6O2
- 22. Multiple Choice22. This equation is unbalanced: SeCl6 + O2 --> SeO2 + Cl2 The balanced version is:SeCl6+2O2 --> SeO2 +6Cl4SeCl6 + O2 --> 4SeO4 + 4Cl2SeCl6 + O2 --> SeO2 + Cl2SeCl6 + O2 --> SeO2 + 3 Cl2
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