Saved Bookmarks
| 1. |
Define Dobereiner's triad with example. |
|
Answer» ong>Explanation: DOBEREINER's Triads are groups of three elements arranged in such a way that the atomic weight of the MIDDLE element is ALMOST the average of the other two. The elements of triad have almost similar properties. For example, consider Li,Na and K with atomic WEIGHTS 7,23 and 39 g/mol respectively. 7+39/2 =23 The atomic weight of Na is almost the average of the atomic weights of Li and K. Other examples include (i) Ca(40),Sr(88) and Ba(137) (ii) Cl(35.5),Br(80) and I(127). |
|