Which one of the following groupings represents a collection of isoelectronic species? (At. nos. : Cs : 55, Br : 35)
02Medium113×since 2002Q2133
Which one of the following sets of ions represents the collection of isoelectronic species? (Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)
03Easy113×since 2002Q2134
Of the following sets which one does NOT contain isoelectronic species?
04Medium113×since 2002Q2135
Pick out the isoelectronic structure from the following :
\eqalign{
& \left( i \right)\,\,\,\,\,\,C{H_3}^ + \cr
& \left( {ii} \right)\,\,\,\,{H_3}{O^ + } \cr
& \left( {iii} \right)\,\,\,N{H_3} \cr
& \left( {iv} \right)\,\,\,\,C{H_3}^ - \cr}
05Easy113×since 2002Q2136
Which of the following sets of ions represents a collection of isoelectronic species?
06Easy113×since 2002Q2141
Hydrogen has three isotopes (A), (B) and (C).
If the number of neutron(s) in (A), (B) and (C)
respectively, are (x), (y) and (z), the sum of (x),
(y) an (z) is :
07Easy113×since 2002Q2142
The orbital having two radial as well as two angular nodes is :
08Easy113×since 2002Q2143
A certain orbital has no angular nodes and two radial nodes. The orbital is :
09Easy113×since 2002Q2144
Outermost electronic configuration of a group 13 element, E, is 4s², 4p¹. The electronic configuration of an element of p-block period-five placed diagonally to element, E is :
10Easy113×since 2002Q2145
The number of radial and angular nodes in 4d orbital are, respectively