Chemistry Exam

1. 1A chemical change occurs when:

   1. Asugar dissolves in water
   2. Bpaper is cut into many pieces
   3. Csalt remains when water evaporates from a salt water mixture
   4. Dwood is burning in the fireplace
2. 2A physical property that DOES NOT change when you change the amount of the substance (ex. color does not change when the crayon is cut in half) is:

   1. Aan intensive property
   2. Bindependent variable
   3. Can extensive property
   4. Ddependent variable
3. 3A physical change is:

   1. Adescription of observations and measurements
   2. Bdescription of a chemical’s reactivity
   3. Cwhen the composition of a substance is unchanged, only changes appearance
   4. Dwhen the composition of a substance is changed, creating something new
4. 4A chemical property is :

   1. Adescription of observations and measurements
   2. Bdescription of a chemical’s reactivity
   3. Cwhen the composition of a substance is unchanged, only changes appearance.
   4. Dwhen the composition of a substance is changed, creating something new.
5. 5 Henry Jenkins’ mom baked him a pie for his 35th birthday. This is an example of a:

   1. Aphysical change
   2. Bboth a physical and chemical change
   3. Cchemical change
   4. Dnone of the above
6. 6Anything that has mass and takes us space is called:

   1. Aelements
   2. Bmatter
   3. Cchemicals
   4. Dvolume
7. 7Neutrons have:

   1. Anegative charges
   2. Bno charges
   3. Cpositive charges
   4. Dno mass
8. 8The atomic number ALWAYS represents the number of

   1. Aatoms
   2. Bneutrons
   3. Cprotons
   4. Dnuclei
9. 9A particle that has about the no mass and with a NEGATIVE charge is called a(n)

   1. Anuclide
   2. Belectron
   3. Cneutron
   4. Dproton
10. 10Krypton has atomic number of 36 and mass number of 84. It has

    1. A36 protons, 36 electrons, and 120 neutrons.
    2. B84 protons, 84 electrons and 36 neutrons
    3. C36 protons, 36 electrons, and 48 neutrons
    4. D48 protons, 48 electrons, and 36 neutrons

11. 11Electrons are located:

    1. Ain the nucleus of an atom
    2. Bin the energy levels
    3. Cbonded to protons
    4. Dbonded to neutrons
12. 12How many neutrons does Bromine-82 contain?

    1. A12
    2. B47
    3. C34
    4. D82
13. 13A sodium isotope consists of 11 protons, 11 electrons, and 12 neutrons. Its mass number is:
    

    1. A11
    2. B22
    3. C12
    4. D23
14. 14 Isotopes of the same element must have the same number of:

    1. Aneutrons
    2. Belectrons
    3. Cprotons
    4. Dneutrons and protons
15. 15What is the name of the atom that has 11 protons, 11 electrons and 12 neutrons?

    1. ACarbon
    2. BMagnesium
    3. CSodium
    4. DVanadium
16. 16How many protons are in the atom represented by 63 29 Cu :

    1. A63
    2. B34
    3. C29
    4. D92
17. 17When you add the protons and the neutrons together, this gives you the atom’s_______.

    1. AAtomic number
    2. BMass number
    3. CEnergy level
    4. Dcharge
18. 18 Horizontal rows of the Periodic Table are called:

    1. AClusters
    2. Bgroups/families
    3. Cperiods
    4. Denergy levels
19. 19Vertical columns of the Periodic Table are called:

    1. AOxidation
    2. Bgroups/families
    3. Crows
    4. DPeriods
20. 20The _________ are located to the left of the zigzag line on the periodic table and they make up more than 75% of the elements:
    

    1. Ametals
    2. Bnonmetals
    3. Cmetalloids
    4. Dnoble gases
21. 21These types of elements are brittle, dull and usually poor conductors of heat and electricity:

    1. AMetalloids
    2. Bnonmetals
    3. Cnoble gases
    4. Dmetals
22. 22These two particles are found in the nucleus of an atom:

    1. AProtons and electrons
    2. BProtons and neutrons
    3. CElectrons and neutrons
    4. DElectron cloud and orbitals
23. 23The atomic number tells you the number of _______ and ______ in an atom.
    

    1. AElectrons and protons
    2. BNeutrons and electrons
    3. CElectrons and particles
    4. DNucleus and mass number
24. 24The electrons are found orbiting around the nucleus in a(n) _________:

    1. APeriod
    2. BFamily
    3. CNucleus
    4. DElectron cloud
25. 25The electrons in the outer shell of an atom’s Bohr model are called:

    1. Astable
    2. Bvalence
    3. COctet rule
    4. Dions
26. 26 What type of bond is formed between metals and nonmetals?

    1. Acovalent
    2. Bmetallic
    3. Chydrogen
    4. Dionic
27. 27Which type of bond is formed when an atom of sodium transfers an electron to an iodine atom?

    1. Apolar covalent
    2. Bmetallic
    3. Cionic
    4. Dnonpolar covalent
28. 28Substances formed during a chemical reaction are ______________________
    

    1. ACatalysts
    2. BOxides
    3. CReactants
    4. DProducts
29. 29Which of the following is NOT evidence that a chemical reaction has occurred?
    

    1. Acolor change
    2. Bsolid formation
    3. Cgas formation
    4. Dchange of state
30. 30What are the two types of covalent bonds:

    1. ACation and anion
    2. BPolar and nonpolar
    3. Cpositive and negative
    4. DGains and losses
31. 31Bonds where electrons roam freely are called:

    1. AIonic bond
    2. BMetallic bond
    3. Ccovalent bond
    4. DNonpolar bond
32. 32Which of these properties DO not describe ionic compounds.

    1. ASoft substance
    2. BBrittle and hard
    3. Chigh melting points
    4. DCrystalline solid
33. 33In ionic bonds, when an element gains an electron, it has a ______ charge.

    1. APositive
    2. BNegative
    3. Ccovalent bond
    4. Dmolecule
34. 34A force that holds two atoms together is a:

    1. AChemical bond
    2. Bcovalent bond
    3. Clewis structure
    4. DAnion
35. 35What electrons are involved in chemical bonding:

    1. AValence
    2. BInner
    3. Cpositively charged
    4. DNegatively charged
36. 36The type of chemical bond that results from sharing valence electrons is a:

    1. AMolecule
    2. Bcovalent bond
    3. Cmetallic bond
    4. Dsigma bond
37. 37The value that indicates the attraction of an atom for shared electrons is called:

    1. AOctet
    2. BElectronegativity
    3. Cpolarity
    4. Dcation
38. 38If the calculated electronegativity difference is greater than 1.8, it is considered what type of bond:

    1. AIonic bond
    2. BNonpolar covalent
    3. Cpolar covalent
    4. Dmetallic
39. 398 electrons in the valence shell of an element meets which rule:

    1. AOctet rule
    2. BElectronegativity rule
    3. Cbohr rule
    4. DMolecular rule
40. 40When a nonmetal bonds with a metal what type of bond is formed:

    1. AIonic bond
    2. BNonpolar covalent
    3. Cpolar covalent
    4. DMetallic
41. 41Which of these is the correct formula for Chlorine tetrahydride?

    1. ACH2
    2. BH4Cl
    3. CClH4
    4. DCaH
42. 42Which of these is the correct name for Disilicon decaiodide?

    1. ASiI3
    2. BSi2I 10
    3. CD2I3
    4. DSI7
43. 43Which chemical equation correctly represents the form for a decomposition reaction?

    1. AAB→ A +B
    2. BA + B→ AB
    3. CAY + B→ BY + A
    4. DAY + BX→ BY + AX
44. 44 This states that matter is neither created nor destroyed, but conserved. It is also the reason for balancing equations:
    

    1. AStoichiometry
    2. BLaw of Conservation of Mass
    3. CAvogadro’s Number
    4. DMole Ratio
45. 45 This number represents the number of particles, atoms, molecules or formula units in any substance:
    

    1. AMass
    2. BAvogadro’s number
    3. CMole
    4. DMolar ratio
46. 46What do you call the substances on the left side of a chemical equation?

    1. AProducts
    2. BReactants
    3. CMoles
    4. DGrams
47. 47 This is the type of reaction in which two or more reactants combine to form a single product:

    1. ADouble displacement
    2. BSingle displacement
    3. CCombustion
    4. DSynthesis
48. 48A change that occurs when two or more substances combine to form a new substance is called a:

    1. AMolar mass
    2. BStoichiometry
    3. CChemical reaction
    4. DLaw of Conservation of Mass
49. 49The→ in a chemical equation means:

    1. AAdded to
    2. BReacts with
    3. CYields
    4. DCreates
50. 50 The atoms in a chemical equation must be balanced. That means:

    1. ASame kind on each side
    2. BSame total number on each side
    3. CSame size on each side
    4. DSame number and kind on each side
51. 51The number in a chemical formula which tell you the number of moles or molecules:

    1. ASubscript
    2. BCoefficient
    3. COxidation numbers
    4. DRow numbers
52. 52The products of this type of reaction are always carbon dioxide and water:
    

    1. ADecomposition
    2. BSingle replacement
    3. CDouble replacement
    4. DCombustion
53. 53Which of the following changes is a chemical change of matter?
    

    1. AIce melting to produce water
    2. BVinegar combining with baking soda to produce carbon dioxide
    3. CWater boiling to produce water vapor
    4. DLiquid silica solidifying to form glass
54. 54Which of the following is a physical change of matter?
    

    1. AWater evaporating
    2. BPaper burning
    3. CA nail rusting
    4. DA silver spoon tarnishing
55. 55Which of the following is an example of a heterogeneous mixture?

    1. ATap water
    2. BChunky peanut butter
    3. COrange colored sugar water
    4. DGold ring
56. 56A substance that cannot be chemically broken down into simpler substances is considered a:

    1. AHomogeneous mixture
    2. BAn electron
    3. CA compound
    4. DAn element
57. 57A change in matter that produces new substances is called a:
    

    1. APhysical change
    2. BChemical change
    3. CElement
    4. DPhase change
58. 58The _________ are located to the left of the zigzag line on the periodic table and they make up more than 75% of the elements:
    

    1. Ametals
    2. Bnonmetals
    3. Cmetalloids
    4. Dnoble gases
59. 59These types of elements are brittle, dull and usually poor conductors of heat and electricity:
    
    
    

    1. AMetalloids
    2. Bnonmetals
    3. Cnoble gases
    4. Dmetals
60. 60This is the name of all elements in group 18 on the periodic table:
    

    1. Anoble gases
    2. Balkaline earth metals
    3. Chalogens
    4. Dtransition metals

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