Problem: Which of these atoms has the largest number of neutrons in the nucleus?(a) 148Eu (b) 157Dy (c) 149Nd (d) 162Ho (e) 159Gd

🤓 Based on our data, we think this question is relevant for Professor Idwasi's class at Tulsa Community College.

FREE Expert Solution

We are asked which of these atoms has the largest number of neutrons in the nucleus?


Recall that the atomic mass is the sum of protons and neutrons


Atomic mass = # of protons + # of neutrons


Recall: Atomic # = # protons


(a) 148Eu 

  • Atomic number = 63
  • #neutrons = 148 -63 = 85


(b) 157Dy 

  • Atomic number =  66
  • #neutrons = 157 -66 = 91


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Problem Details

Which of these atoms has the largest number of neutrons in the nucleus?

(a) 148Eu 

(b) 157Dy 

(c) 149Nd 

(d) 162Ho 

(e) 159Gd

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Based on our data, we think this problem is relevant for Professor Idwasi's class at Tulsa Community College.