AP EAMCET201824 Apr 2018Morning ShiftChemistryStructure of AtomActual
The mass numbers of two elements X and Z are 52 and 75 respectively. X contains 16.6 % more neutrons compared to protons. Z contains 27.3 % more neutrons compared to protons. X and Z are respectively
Options
- A₂₄ Cr _ ₃₃ As
- B₂₄ Cr _ ₃₀ Zn
- C₁₉ ~K , ₃₃ As
- D₂₉ Cu _ ₃₀ Zn
Correct answer
A. ₂₄ Cr _ ₃₃ As
Step-by-step solution
Given, mass number of X=52 Mass number of Z=75 Suppose, number of protons in X=a Number of neutrons =0.166 a+a=1.166 a As we know that, Mass number = Number of proton + Number of neutron aligned 52 & =a+1.166 a 52 & =2.166 a a & =24 aligned Thus, the element X= ₂₄ Cr [ atomic number = number of protons or electrons] Similarity, for the element Z , aligned 75 & =b+1.273 b=2.273 b b & =32.9 33 aligned Thus, the element Z is ₃₃ As.