Which of the following transitional metal has lowest density
$Sc$
$Ti$
$V$
$Cr$
The transition metal ions responsible for colour in ruby and emerald are, respectively
Which of the following ionic species will impart colour to an aqueous solution
Which of the following set of elements does not belong to transitional elements set
Most transition metals
$I :$ form sets of compounds which display different oxidation states of the metal
$II :$ form coloured ions in solution
$III :$ burn vigorously in oxygen
$IV :$ act as catalyst
Which one of the following ions is the most stable in aqueous solution?
(At. No. $Ti = 22, V = 23, Cr = 24, Mn = 25$)