InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Atomic number of an element is 20. What arethe number of electrons is K, L, M and Nenergy levels or shells ? |
|
Answer» For a calcium atom with atomic number 20, the shells K, L, M and N will have 2, 8, 8 and 2 electrons, respectively. K-shell contains 2 atoms and L-shell contains 8 atoms. M-shell can accommodate upto 18 electrons but in the case of calcium, the M-shell has 8 electrons; the next electron enters the N-shell. That is, the fourth shell-N has started to fill up even before the third energy shell-M is complete with 18 electrons. |
|