Actinoids Flashcards
Actinoid metals are all ___ in appearence
Silvery
Actinoids display a
Variety of structures
Irregularities of metallic radii in __ > __
Actinoids > Lanthanoids
Actinoids reactivity is
High
Action of __ water on actinoids gives
Action of boiling water gives oxide + hydride
Combination with most __ occurs at __
Non metals; moderate temperature
With hydrochloric acid
Reaction is given
With nitric acid
No reaction, formation of protective layer
With alkali
No reaction
Act vs Lan, which has higher magnetic susceptiblity
Lanthanoids
Behaviour similar to that of lanthanoids is evident in the ___ half of the actinoid series
second half
Which property do early actinoids and langthanoids not have in common
Change in oxidation state
+4 oxidation state
Cerium (Z=58)
Assertion: Actinoids show greater range of oxidation states
Reason: 5f, 6d and 7s levels have comparable energies
Which part of actinoid series exhibit higher oxidation states
First half
