InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
The number of neutrons are equal to the number of protons present in the nucleus of two elements X and Y and their dinegative ions possess 8 electrons in L and M shells respectively . Then the ratio of mass number of the two elements isA. `1 : 2`B. ` 2 : 3`C. `3 : 4`D. ` 2 : 5` |
|
Answer» Correct Answer - 1 The electronic configuration of the dinegative ion with 8 in electrons in L valence shell is : `X^(-2)to2,8` `Xto2,6 `( Z) , mass number is 16 for X. The electronic configuration of the dinegative ion with 8 electrons is M shell is `Y^(-2)to2,8,8` `Yto2,8,6 (Z)` Mass number is 32 (A) for Y. Ratio of mass number is `16 :32rArr1 :2` |
|