Atomic Structure Worksheet

20 Points

Name:__________________________________        Period:______________

The atomic structure is determined by using the following rules:

1.    The number of protons is equal to the atomic number

2.    The number of electrons is equal to the atomic number

3.    The number of neutrons is determined by subtracting the atomic number from the atomic mass

        a.    For this determination, round the atomic mass to the nearest whole number.

number of neutrons = mass number - atomic number

Complete the following table, using the information in your periodic table.

Element Symbol Atomic Number Atomic Mass Protons Neutrons Electrons
Lithium Li 3 7 3 4 3
Beryllium            
Titanium            
Boron            
Argon            
Silicon            
Cobalt            
Manganese            
Platinum            
Gold            
Uranium            
Cerium            
Potassium            
Cesium            
Bromine            
Iodine            
Tungstun            
 
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Last modified: April 14, 2012

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