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Addition Word Problem:

1) The Class Teacher Has Given the Students the Number of Neutrons and the Atomic Number of the Following Element. He Also Taught Them That-

Here Is the List of the Elements. Read the List Carefully and Find Their Atomic Mass. Fill In the Blank Rows. One Is Done for You as an Example.

Element Atomic Number (Z) Number of Protons (N) Atomic Mass (A)
Technetium Z = 43 N = 55 A = N + Z
= 55 + 43
= 98
Promethium Z = 61 N = 84  
Polonium Z = 84 N = 121  
Radon Z = 86 N = 132  
Astatine Z = 84 N = 125  
Curium Z = 96 N = 151  
Fermium Z = 104 N = 157  
Rutherfordium Z = 104 N = 157  

 

Element Atomic Number (Z) Number of Protons (N) Atomic Mass (A)
Technetium Z = 43 N = 55 A = N + Z
= 55 + 43
= 98
Promethium Z = 61 N = 84 A = N + Z
= 61 + 84
= 145
Polonium Z = 84 N = 121 A = N + Z
= 84 + 121
= 205
Radon Z = 86 N = 132 A = N + Z
= 86 + 132
= 218
Astatine Z = 84 N = 125 A = N + Z
= 85 + 125
= 210
Curium Z = 96 N = 151 A = N + Z
= 96 + 151
= 247
Fermium Z = 104 N = 157 A = N + Z
= 100 + 157
= 257
Rutherfordium Z = 104 N = 157 A = N + Z
= 104 + 157
= 261
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