Use the theoretical chemical symbol below to determine is corresponding statements are true or false.    Element Z has 710 protons.  [1] Element Z has 405 neutrons.  [2] Element Z has 307 electrons.  [3]  

Which of the following compounds contains an exception to the octet rule on the central atom? SO3 [1] BF3 [2] NO2 [3]

Which of the following statement(s) is/are correct  Sample A can be a representation of a flask containing sulfur dioxide gas. Sample B can be a representation of a flask containing carbon monoxide gas. Sample C can be a representation of a flask containing helium gas and hydrogen gas. 

Which of the following statement(s) is/are correct?   Ag is the symbol for silver H is the symbol for hydrogen S is the symbol for sodium 

Choose the correct name for NiS2. 

Which of the following gases have the greatest root mean square velocity/speed?

The following image shows interactions between molecules of ethylamines (CH3CH2NH2). From the image identify the hydrogen bonds. 

Which of these ions has the largest radius (O2-, F-, Na+, or Mg2+)?

Using the data below on successive ionization energies, determine what the element could be?    Number of Electrons Removed  Ionization Energies (kJ/mol)   1  600  2  1200  3  3000  4  12,000  5  13,000  6  14,500  7  15,600 

Determine the amount of heat released (in kilojoules) when 12.20 grams of ethane, C2H6, undergoes combustion according to the following equation: 2C2H6 (g) + 7O2 (g)