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- 1. Multiple ChoiceHow many electrons should Lithium have around its Lewis dot model?1234
- 2. Multiple ChoiceHow many electrons should Carbon have around its Lewis dot model?1345
- 3. Multiple ChoiceHow many electrons should Chlorine have around its Lewis dot model?5678
- 4. Multiple Choice
This is a correct dot diagram for oxygen (O)truefalse - 5. Multiple ChoiceThis is a correct dot diagram for fluorine (F)truefalse
- 6. Multiple ChoiceThis could be the dot diagram ofMgClCO
- 7. Multiple Choice
What is the correct Lewis Dot Structure for ammonia NH3
- 8. Multiple Choice
Which is the correct molecular structure for carbon dioxide?
- 9. Multiple Choice
How many total valence electrons are participating in bonding in the molecule above?
8
4
2
3
- 10. Multiple Choice
CO2 has how many lone pairs on the central atom?
0
1
2
3
4
- 11. Multiple Choice
NH3 has how many lone pairs?
0
1
2
3
- 12. Multiple Choice
CCl4 has how many double bonds?
0
1
2
3
- 13. Multiple Choice
Carbonate (CO32-) has how many double bonds?
0
1
2
3
- 14. Multiple Choice
In HCN (Carbon is usually the central atom) what kind of bond is between the C and N
Single
Double
Triple
- 15. Multiple Choice
CH2O has which of the following?
Multiple double bonds
Multiple single bonds
One double bond
One single bond
A lone pair
- 16. Multiple Choice
Which of the following elements are an exception to the octet rule and require less than 8 valence electrons?
H
Li
Be
B
C
- 17. Multiple ChoiceThree pairs of electrons are shared in aSingle bondDouble bondTriple bond
- 18. Multiple ChoiceA covalent bond isa bond that shares electrons metallicalyA bond that shares electrons with non metalsMetalloids bondingmetals and nonmetals bonding
- 19. Multiple ChoiceHow many electrons does each line indicate are shared?1234
- 20. Multiple ChoiceAccording to the octet rule most elements need _______ valence electrons.28618
- 21. Multiple Choice
What is this element?
1s22s22p63s23p6
4s23d104p6
Argon
Krypton
Selenium
Bromide
- 22. Multiple Choice
Choose the correct shortcut configuration for iodine.
[Ar]4s24d104p5
[Kr]5s24d105p5
[Xe]5s25d105p5
none of the above
- 23. Multiple Choice
What are valence electrons?
All the electrons an atom has.
Only the electrons in the 1st energy level.
Only the electrons in the outer energy level.
Total number of protons and neutrons.
- 24. Multiple Choice
Which version of carbon is the anion?
- 25. Multiple Choice
When a bond forms between hydrogen (H) and oxygen (O), the electrons are shared. Which diagram correctly shows the bond between hydrogen and oxygen?
- 26. Multiple Choice
Covalent bonds form between which 2 types of elements?
metals and non-metals
2 metals
2 non-metals
- 27. Multiple Choice
How many electrons can the first shell hold?
2
4
6
8
- 28. Multiple ChoiceWhat happens when the sodium atom loses an electron?It become negatively chargedIt become positively chargednone
- 29. Multiple ChoiceIf an atom loses two electrons what charge will it have?+ 2- 2+1-1
- 30. Multiple ChoiceAccording to the diagram below, how many bonds will this atom need to make to be stable?1234
- 31. Multiple ChoiceHow many more valence electrons does Oxygen need to be stable?624It's already stable with 8
- 32. Multiple ChoiceMost elements will gain or lose electrons so that they end up with _______ valence electrons.26810
- 33. Multiple ChoiceIf electrons are shared unequally then the bond is....Non-polar covalentIonicNon-polar ionicPolar covalent
- 34. Multiple ChoiceIf electrons are shared equally then the bond is....Non-polar covalentIonicNon-polar ionicPolar covalent
- 35. Multiple ChoiceMetals and nonmetals form which kind of bond?Polar covalentIonicNon-polar covalentMetallic
- 36. Multiple ChoiceHow strongly an atom attracts electrons is called....................Ionization energyElectronegativityElectricityNuclear force
- 37. Multiple Choice
What is a Lewis Dot Structure?
It shows all of the particles in the atom.
Contains protons and neutrons
Only shows the element symbol and it's outer most electron shell
Contains protons and electrons
- 38. Multiple Choice
What is the atom called when there is adding or removing electrons creates atoms with (+) or (-) charges?
isotopes
ions
neutral
stable
- 39. Multiple Choice
Does the following reference Polar, Nonpolar, or both:
"electronegativity values are the same"?
Polar
Nonpolar
Both
- 40. Multiple Choice
CO2 has polar bonds but is a NON POLAR molecule. Why?
it has an asymmetrical shape
bond polarity or dipole moment between C and O atoms cancel
there is net dipole moment between C and O atoms in molecule
bond polarity does not exist between C+ and O- atoms
- 41. Multiple Choice
Is this molecule polar or nonpolar?
polar
nonpolar
- 42. Multiple ChoiceAccording to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?Pairs of valence electronsInner shell electronsMobile ElectronsElectrons closest to the nucleus
- 43. Multiple ChoiceIn a polar bond, the more electronegative element will assume a partial ________ charge.positivenegative
- 44. Multiple Choice
Type of bond between Br & Br
Ionic
Polar Covalent
Nonpolar Covalent
- 45. Multiple ChoiceWhich molecule contains bonds with a GREATER polarity?HClCCl4
- 46. Multiple Choice
What is the shape? Hint: Draw the Lewis dot structure for NH3.
tetrahedral
trigonal pyramidal
trigonal planar
bent
- 47. Multiple ChoiceWhat is the shape of H2O?lineartetrahedralbenttrigonal pyramidal
- 48. Multiple Choice
SiCl4 has what shape?
trigonal planar
pyramidal
tetrahedral
trigonal pyramidal
- 49. Multiple Choice
3 atoms bonded and 0 lone pairs
linear
trigonal planar
bent
tetrahedral
trigonal pyramidal
- 50. Multiple Choice
3 atoms bonded and 1 lone pairs
true linear
trigonal planar
bent
tetrahedral
trigonal pyramidal
- 51. Multiple Choice
Which of the following compounds has only single bonds?
I only
II only
III only
I and III
III and IV
- 52. Multiple ChoiceA molecule of methane has what shape?TetrahedralTriangularPyramidalOctahedral
- 53. Multiple ChoiceThe theory that is used to predict the arrangement of atoms about a central atom is called?Valence shell repulsionValence shell electron sharingValence shell electron pair repulsionValence electron shell repulsion pair
- 54. Multiple ChoiceAtoms of H only form _________ bonds.DoubleSingleMultipleTriple
- 55. Multiple ChoiceLone electron pairs in a molecule...Never existAre lost in spaceCreates an isotopePush the bonded atoms closer
- 56. Multiple Choice
What is the total number of valence electrons in Ammonium ion (NH4+).
9
8
10
12
- 57. Multiple ChoiceTraveling across a period, from left to right, the atomic radii ______________.IncreasesDecreasesStays the same
- 58. Multiple ChoiceEach element wants to gain or lose electrons so that it can have the same electron configuration as......a Nobel gasother elements in its familyother elements in its periodit used to have before reacting
- 59. Multiple ChoiceWhat is the correct formula for this molecule?NHN3HNH3NH4
- 60. Multiple ChoiceHow many total lone pairs would there be in the Lewis structure for the oxygen molecule?1234
- 61. Multiple ChoiceHow many total lone pairs would be found in the Lewis structure for C2H40246
- 62. Multiple Choice
What is the oxidation number for elements in the Alkali Earth Metals family?
-1
-2
+1
+2
- 63. Multiple Choice
What is the oxidation number for the Halogens family?
-1
-2
+1
+2
- 64. Multiple Choice
What is the oxidation number for the Carbon family?
4
-4
+4
-/+4
- 65. Multiple ChoiceWhat molecular shape is the structure shown here? (BCl3)lineartrigonal planartetrahedraltrigonal pyramidal
- 66. Multiple ChoiceBoron, an exception when it comes to stability, only needs to be surrounded by ____ valence electrons.2468
- 67. Multiple ChoiceWhat molecular shape is the structure shown here? (BeCl2)linearbenttrigonal planartetrahedral
- 68. Multiple ChoiceTrue or False: You can use Lewis Dot structures to diagram elements, ions, ionic compounds, molecular compounds, and polyatomic ions.TrueFalse
- 69. Multiple ChoiceTrue or False: Lewis Dot diagrams (or structures) show ALL electrons for each atom.TrueFalse
- 70. Multiple ChoiceTo determine the SHAPE of a molecular compound you assess the number of bonding groups and unshared electron pairs...on the central atom onlyon all elements in the compoundon the cations onlyon the anions only
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