d and f Block Flashcards
1
Q
The only radioactive lanthanoid
A
Promethium
2
Q
The second ionisation enthalpies of lanthanoids are comparable to those of
A
Calcium
3
Q
The alloy mischmetall consists of
A
A lanthanoid metal (~95%) and iron (~5%) and traces of S, C, Ca and Al.
It is used in Mg-based alloy to produce bullets, shell and lighter flint.
