Saved Bookmarks
| 1. |
Discuss physical properties of lanthanoids. |
|
Answer» Solution :All lanthanoids are silvery white soft metals and TARNISH rapidly in air The hardness increases with increase in atomic number. Samarium is steel hard. The melting POINTS range between `1000-1200`K . However, samarium melts at 1623K They show luster and are good conductors of heat and electricity Density and other properties change smoothyl except for Eu and Yband OCCASIONALLY for Sm and TM. Lanthanoids are paramagnetic except `La^(3+), Ce^(4+), YB^(4+), Yb^(2+) and Lu^(3+)` etc |
|