Exam 4 Review

What is the octet rule and how is it related to bonding?

• The octet rule is the rule that states elements bond to have a full valence shell of 6 electrons. Elements bond for the stability granted by having eight valence electrons.

• The octet rule is the rule that states elements bond to have a full valence shell of 10 electrons. Elements bond for the stability granted by having eight valence electrons.

• The octet rule is the rule that states elements bond to have a full valence shell of 8 electrons. Elements bond for the stability granted by having eight valence electrons.

• The octet rule is the rule that states elements bond to have a full valence shell of 11 electrons. Elements bond for the stability granted by having eight valence electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the Lewis dot structure for NO2- and the formal charges

• [O-N=O]-    5-(2-3)=0,  6-(6-1) = -1, 6-(4-2) =0

  
  

• [O-N=O]-    5-(1-3)=0,  6-(6-1) = -1, 6-(4-2) =0

  
  

• [O-N=O]-    5-(2-3)=0,  6-(5-1) = -1, 6-(4-2) =0

  
  

• [O-N=O]-    5-(2-3)=0,  6-(6-1) = -1, 6-(3-2) =0

  
  

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What does a resonance structure represent?

• A resonance structure does not show any locations for electrons in molecule.

• A resonance structure is something not studied in chemistry.

  
  

• A resonance structure shows only one location for the electrons in a molecule.

  
  

• A resonance structure shows the possible locations for the electrons in a molecule.

  
  

Use bond enthalpy values to find deltaHrxn. [C-H = 410 kj/mol] [C-Cl = 330 kj/mol] CH4(g) + CC14(g) —> CHCl3(g) + CH3Cl(g)

• -3

• 0

• 1

• -5

Tags

NGSS.HS-PS1-4

What is the molecular geometry of CO2?

• 
  Linear

  
  

• tetrahedral

• trigonal planar

• trigonal bipyramidal

What is the molecular and electron domain geometry of SiH4?

• trigonal planar

• tetrahedral

• linear

• trigonal bipyramidal

A molecule can have a polar bond and not have a dipole moment?

• true

• false

A nuclear charge is the electrons pulling away from the nucleus

• false

• true

Select the atom with a larger atomic radius

• N>Cs

• Ne>Li

• Cs> Na

  
  

• Na>Cs

Which species is grouped correctly as isoelectronic?

• K+, Pb2+

• Co3+, H+

• Fe2+, Ne

• Fe2+, Co3+