Chemistry Smorgasbord
Atoms

What is the difference between an ion and an isotope?
 
 
 
 

Which elements are diatomic?
 
 
 

What does the atomic number tell us about the structure of a particular atom?
 
 
 
 

What does the atomic mass tell us about the structure of a particular atom?
 
 
 
 
 

Electron shells

What is electronegativity?
 
 
 
 
 
 

Describe or illustrate the pattern of electronegativity across the periodic table.
 
 
 
 

Grams-moles

You have 100 grams of magnesium oxide in a crucible.  How many moles are there?
 
 
 
 
 

How much would 4 moles of water weigh?
 
 
 
 
 

Balancing equations

Balance the following equations:

H2 + N2  ->  NH3
 
 
 

Ca(OH)2 + HNO3  ->  Ca(NO3)2 + H2O
 
 

Moles and Reactions

How many grams of NaCl would be produced from a reaction of 35 grams of sodium?
 
 
 
 
 
 
 
 
 
 
 
 

Solutions

Give examples of a solution of...

...a solid and a liquid-

...several gases-

...a gas and a liquid-

...two or more liquids-
 

Define:

supersaturation-

heterogeneous solution-
 

How many moles of NaCl are necessary to make 2.5 L of 1.25 M solution?
 
 
 
 
 

How many liters of 5.0 M saline solution would contain 6.2 moles of salt?
 
 
 


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