NTA Abhyas NEET2020ChemistryChemical KineticsPractice
Calculate the number of protons, neutrons and electrons in the element 89 231 Y
Options
- A89, 89, 242
- B89, 71, 89
- C89, 142, 89
- D89, 231, 89
Correct answer
C. 89, 142, 89
Step-by-step solution
In 89 231 Y number of protons and electrons is 89 and No. of neutrons = A - Z = 231 - 89 = 142 .