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- 1. Multiple ChoiceAn atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom?29356493
- 2. Multiple Choice
Which pair of elements has the most physical and chemical properties in common?Ge and SeK and KrAl and GaBa and Bi - 3. Multiple ChoiceA gemstone has a mass of 6.24 grams and a volume of 1.98 cm3. What is the density of the gemstone?2.203.013.153.50
- 4. Multiple ChoiceWhich accounts for most of the mass of an atom?electronsprotonsneutrons and protonselectrons and neutrons
- 5. Multiple ChoiceWhat kind of bond is responsible for atoms of pure gold to remain bonded?covalenthydrogenionicmetallic
- 6. Multiple ChoiceWhich describes an atom with an atomic number of 9?10 protons, 9 neutrons9 protons, 10 neutrons4 protons, 5 neutrons3 protons, 3 neutrons
- 7. Multiple ChoiceWhich best represents how electrons are arranged in the energy levels of a carbon atom?1 electron in first energy level, 5 electrons in the second energy level2 electrons in first energy level, 4 electrons in the second energy leve3 electrons in first energy level, 3 electrons in the second energy leve4 electron in first energy level, 2 electrons in the second energy leve
- 8. Multiple ChoiceHow many neutrons are in an atom of Pu-246?94150152246
- 9. Multiple ChoiceWhich element has the same number of valence electrons as Krypton (Kr)?Neon (Ne)Fluorine (F)Chlorine (Cl)Selenium (Se)
- 10. Multiple ChoiceWhich statement best describes the atoms of elements that form compounds by covalent bonding?they share electrons between themthey have a large difference in atomic numberthey are in the same period in the periodic tablethey have a large difference in valence electron number
- 11. Multiple ChoiceAtoms of which two elements will form an ionic bond?Mg and ClN and OFe and CoRb and Al
- 12. Multiple ChoiceWhich compound will most likely be formed when Lithium (Li) and Nitrogen (N) are chemically combined?LiNLi3NLiN3Li3N3
- 13. Multiple ChoiceAn element located in group 18 and period 4 would be classified as which type of substance?a halogena metalloida lanthanoida nonmetal
- 14. Multiple ChoiceWhy does a flat piece of paper take longer to reach the ground than paper crumpled into a ball?The flat piece of paper has more mass.The crumpled piece of paper has more mass.Frictional force of air has more effect on flat paper.Frictional force of air has more effect on crumpled paper.
- 15. Multiple ChoiceWhy does the weight of an object change with increasing elevation on Earth?Mass decreases with higher elevation.Force of gravity increases with higher elevation.Force of gravity decreases with higher elevation.Mass increases with higher elevation.
- 16. Multiple ChoiceWhat type of friction occurs when an eraser is rubbed across a sheet of paper?StaticRollingSlidingFluid
- 17. Multiple ChoiceTwo students pull on opposite ends of a rope, neither student moves. Why?They each pull with the same force, net force is zero.They each exert the same amount of friction, net friction=0.Their forces are not balanced, but gravity prevents movementThe two students have the same mass.
- 18. Multiple ChoiceWhich is an example of a mixture?Iron FilingsBronze pipeCopper wireTitanium plate
- 19. Multiple ChoiceAn element located at Group 18 and Period 4 would be classified as which type of substance?HalogenLanthanoidMetalloidNonmetal
- 20. Multiple ChoiceWhich two elements have the same number of valence electrons?C and OCl and FNa and MgGa and Ge
- 21. Multiple ChoiceWhich of these elements is the most chemically reactive?Zinc (Zn)Potassium (K)Iron (Fe)Germanium (Ge)
- 22. Multiple ChoiceSome coins are alloys if zinc (Zn) and copper (Cu). Which type of bond forms these coins?covalenthalogenionicmetallic
- 23. Multiple ChoiceA gas has a volume of 4.52 L. If its mass is 8.05 g, what is the identity of the gas?heliumneonargonkrypton
- 24. Multiple ChoiceIf it took 5.38s to reach the final velocity, which train had the greatest acceleration?WXYZ
- 25. Multiple ChoiceAt which temperature does KCl have the same solubility as CuSO4?18°C38°C73°C100°C
- 26. Multiple ChoiceThe board exerts and upward force of 50 N. Which best explains this situation?The board has a weight of 50 N.The combined weight of the two bricks is 50 N.The cylinder has a weight of 50 N.The combined weight of the bricks, board, cylinder is 50 N.
- 27. Multiple ChoiceHow can two different nonmetals form a compound?by sharing protonsby sharing electronsby transferring protonsby transferring electrons
- 28. Multiple ChoiceWhat is the correct name for the compound NaNO3?sodium nitratesodium nitrous acidsodium nitrogen oxidesodium nitrogen trioxide
- 29. Multiple ChoiceWhich element is represented?boron (B)phosphorus (P)sulfur (S)bromine (Br)
- 30. Multiple ChoiceHow many protons and neutrons does boron-11 have?11 protons, 11 neutrons11 protons, 0 neutrons6 protons, 5 neutrons5 protons, 6 neutrons
- 31. Multiple ChoiceWhich is the chemical formula for magnesium hydroxide?Mg(OH)2MgOHMgOH2Mg2OH
- 32. Multiple ChoiceWhich is a correctly balanced chemical equation?CuCl2 + 2Al → 2AlCl3 + Cu2CuCl2 + Al → AlCl3 + 2Cu2CuCl2 + 3Al → 3AlCl3 + 2Cu3CuCl2 + 2Al → 2AlCl3 + 3Cu
- 33. Multiple ChoiceWhen this equation is balanced, which coefficient should be placed before NaCl?2345
- 34. Multiple ChoiceWhich type of chemical reaction is represented?Double replacementSingle replacementDecompositionSynthesis
- 35. Multiple ChoiceLitmus paper measures the pH of solutions. What solution would turn litmus paper red?NaOHNaClHClNNH3
- 36. Multiple ChoiceWhich solution has a pH greater than 7?H2O, because it is neutral.HF, because it is an acid.LiF, because it is a salt.LiOH, because it is a base.
- 37. Multiple ChoiceWhy are beta (β) particles able to penetrate objects better than alpha (α) particles are?because β particles are larger than α particlesbecause β particles are smaller than α particlesβ particles are negatively charged, α particles are neutralβ particles travel in line, α particles travel in waves
- 38. Multiple ChoiceWhich group is in order of increasing ability to penetrate an object?alpha, proton, betaalpha, beta, gammabeta, proton, alphagamma, beta, alpha
- 39. Multiple Choice100 grams of Radium-226 has a half-life of 1,600 years. How long until 12.5 grams are left?1,600 years3,200 years4,800 years6,400 years
- 40. Multiple ChoiceWhy does a student's hand feel cold when holding an ice cube?Heat flows from the hand to the ice cube.Heat flows from the ice cube to the hand.Cold flows from the hand to the ice cube.Cold flows from the ice cube to the hand.
- 41. Multiple ChoiceWhat happens to molecules in a pot of water as it is heated?The move faster.They move slower.They lose thermal energy.They gain potential energy.
- 42. Multiple ChoiceBox X and Y are on a shelf 10 m above the floor. X has a mass of 4 kg & Y has a mass of 8 kg.X and Y have no potential energy.X has less potential energy than Y.X has more potential energy than Y.X and Y both have 784 J of potential energy.
- 43. Multiple ChoiceWhich describes the kinetic energy of a ball in free fall?The kinetic energy remains the same, the velocity increases.The kinetic energy decreases, the velocity increases.The kinetic energy increases, the velocity increases.The kinetic energy remains the same, velocity decreases.
- 44. Multiple ChoiceHow do radio waves and visible light waves differ?Radio waves have a shorter wavelength than visible light.Radio waves move faster than visible light waves.Radio waves have a lower frequency than visible light waves.Radio waves have more energy than visible light waves.
- 45. Multiple ChoiceWhat type of wave is represented?Longitudinal waveTransverse waveSound wavePrimary wave
- 46. Multiple ChoiceWhich is true about a series circuit?All the current flows through every part of the circuit.Every part of the circuit is positively charged.The current through the circuit can take several paths.Every part of the circuit is negatively charged.
- 47. Multiple ChoiceIf light bulb 3 burns out in this circuit, what will happen to light bulb 2?1 and 2 will work.1 and 2 will not work.1 will work, 2 will not.1 will not work, 2 will.
- 48. Multiple ChoiceA student wants to build a simple circuit. Which material would have the least resistance?Long wires with a thin diameterlong wires with a large diametershort wires with a thin diametershort wires with a large diameter
- 49. Multiple ChoiceTwo magnets are stuck together. What statement best describes these magnets?North poles are attracted to each otherSouth poles are attracted to each otherSouth poles repel north polesNorth poles attract south poles
- 50. Multiple ChoiceWhich action will have the least effect on the strength of an electromagnet?Changing the amount of currentChanging the direction of the currentChanging the number of wire loopsChanging the size of the metal core
- 51. Multiple ChoiceWhy are electromagnets used for car door locks which can be unlocked by pushing a button?Electromagnets conserve energyElectromagnets prevent static electric shockElectromagnets can easily be turned offElectromagnets can attract metals or nonmetals
- 52. Multiple ChoiceGraph for substance in liq. state. Explain why temp. is constant t = 2 min to when t = 5 min?substance absorbs heat as it changes from liquid to a solidheat is released as it changes from a liquid to a solidheat is released as it changes from a liquid to a gassubstance absorbs heat as it changes from a liquid to a gas
- 53. Multiple ChoiceThis diagram represents a closed series circuit. What would happen if the voltage were doubled?The current would quadruple.The current would double.The current would remain constant.The current would be reduced by half.
- 54. Multiple ChoiceWhich compound results from covalent bonding?NH4Cl .K2SO4 .NaCl .C6H12O6 .
- 55. Multiple ChoiceHow does a step-down transformer alter the amount of voltage from a power line to a building?Increases output volts by ↑ the # of wire turns in 2nd coil.Decreases output volt by ↓ the # of turns in 2nd coil.Increases output volts by ↓ the # of wire turns in 2nd coil.Decreases output volts by ↑ the # of turns in 2nd coil.
- 56. Multiple ChoiceStudent X pushes 10N box with f = 2N and Student Y pushes with f = 6N, in opposite direction. What will occur?The resultant force on the box would be 8 N.The resultant force on the box would be 18 N.The box will move towards Student X.The box will move towards Student Y.
- 57. Multiple ChoiceBall dropped and hits the ground in 1.5 s with a final speed = 15 m/s. What is the impact on acceleration and final speed if dropped from an increased height?Speedf would ↑ because rate of acceleration remain the same.Speedf is the same because rate of acceleration is the same.Speedf remain the same because rate of acceleration would ↓.Speedf would ↑ because rate of acceleration would ↑.
- 58. Multiple ChoiceDiagram represents a atom of fluorine-19. Which best describes the structure of fluorine-19?2 e- in the 1st energy level; 7 e- in the 2nd energy level2 e- in the 1st energy level; 8 e- in the 2nd energy level9 protons and 9 neutrons in the nucleus10 protons and 9 neutrons in the nucleus
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