Blog

Determine if the following are endothermic or exothermic:  Boiling acetone is [1] Breaking the carbon and oxygen bonds in CO2 [2] Forming carbon and hydrogen bonds in methane [3]

Determine the polarity of the molecules below: AsCl3 [polar1] BBr3 is [polar2] CHF3 is [polar3]

Use the drop-down menu to identify the electron geometry for each of the molecules listed below. Both carbons in C2H4 have [1] electron geometry SeBr4 has [2] electron geometry NCl3 has [3] electron geometry

Answer the following statement about first ionization energy: The first ionization energy of phosphorous is [IE1]  than silicon The first ionization energy of sulfur is [IE2] than fluorine The first ionization energy of chlorine is [IE3] than bromine

Answer the following statements about the polarity of the bonds:  The hydrogen carbon bond is [P1] The nitrogen oxygen bond is [P2] The bond  between nitrogens in N2 is [P3]

For each pair of atoms or ions, use the drop-down menu to select the larger radius of the two. 1.  K or Rb [1] 2.  Ca or Ga [2] 3.  Cl or Cl– [3] 4,  K+ or K [4]

What is the electron and molecular geometry of KrBr4?

Use the drop-down menu to identify the electron geometry for each of the molecules listed below. Both carbons in C2H4 have [1] electron geometry SeBr4 has [2] electron geometry NCl3 has [3] electron geometry

Which of the following molecules has a central atom with an expanded octet? 

For each pair of atoms or ions, use the drop-down menu to select the larger radius of the two. 1.  K or Rb [1] 2.  Ca or Ga [2] 3.  Cl or Cl– [3] 4,  K+ or K [4]