The set representing the correct order of ionic radius is
Li+ > Be2+ > Na+ > Mg2+
Na+ > Li+ > Mg2+ > Be2+
Li2+ > Na+ > Mg2+ > Be2+
Mg2+ > Be2+ > Li+ > Na+
The statement that is not correct for the periodic classification of elements is
the properties of the elements are the periodic function of their atomic number
non-metallic elements are lesser in number than metallic elements
the first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number
for transition elements, the d-subshells are filled with electrons monotonically with increase in atomic numbers
Which one of the following is correct order of increase of size ?
Mg <Al< Na+ < F -
Na+ < Al < Mg < F -
Na+ < F - < Al < Mg
Na+ < F - < Mg < Al
The ionic mobility of alkali metal ions in aqueous solution is maximum for
K+
Rb+
Li+
Na+
Chloride ion and potassium ion are isoelectronic then
their sizes are same
Cl- ion is bigger than K+ ion
K+ ion is relatively bigger
their sizes depend on other cation and anion
The correct sequence which shows decreasing order of the ionic radii of the elements is
Al3+ > Mg2+ > Na+ > F - > O2-
Na+ > Mg2+ > Al3+ > O2- > F -
Na+ > F - > Mg2+ > O2- > Al3+
O2- > F - > Na+ > Mg2+ > Al3+
The increasing order of the first ionisation enthalpies of the elements B,P,S and F is
F < S < P < B
P < S < B < F
B < P < S < F
B < S < P < F
Which of the following electronic configurations would exhibit the lowest ionisation energy ?
1s2
1s2,2s2 2p2
1s2,2s2 2p6
1s2,2s2 2p6,3s1
The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, K+, Ca2+, Mg2+, Be2+?
Mg2+ < Be2+ < K+ < Ca2+
Be2+ < K+ < Ca2+ < Mg2+
K+ < Ca2+ < Mg2+ < Be2+
Ca2+ < Mg2+ < Be2+ < K+
Which one of the following is smallest in size ?
N3-
O2-
F -