Example


Example

EXAMPLE Isotope Notation:     

Complete the following table. 

 

Symbol Atomic # Mass # #p+ #n #e- Charge
           
  26 56     23  
      34 44 36  

Solution:

Symbol Atomic # Mass # #p+ #n #e- Charge

94

(from subscript)

244

(from left superscript)

94

(equals atomic number)

150

(mass number minus atomic number)

94

(same as protons for uncharged atoms)

0

(no superscript on the right )

 

26 56

26

(equals atomic number)

30

(mass number minus atomic number)

23

3+

(protons minus electrons)

 

34

(equals number of protons)

78

(protons plus neutrons)

34 44 36

2-

(protons minus electrons)

Click here to see an exercise that will allow you to try this task yourself. 

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