_____ does not have any unit.
The magnitude of effective nuclear charge of alkaline earth metals is in the order
Be < Mg = Ca = Sr = Ba
Be < Mg < Ca < Sr< Ba
Be > Mg = Ca = Sr = Ba
Be > Mg > Ca > Sr> Ba
The fourth period of the p- block elements contains
8 elements
6 elements
18 elements
10 elements
Diagonal relationship is shown by
f- block elements
elements of second period
d- block elements
elements of first period
The block and period in the periodic table of the element having the IUPAC symbol Uub is
f- block, 7th period
d- block, 7th period
f- block, 8th period
p- block, 7th period
The property which is not that of an isolated atom is
atomic volume
ionisation energy
electron gain enthalpy
atomic size
Amongst the following elements, whose electronic configuration are given below, the one having the highest ionisation energy is
[Ar] 3d104s24p3
[Ne] 3s23p2
[Ne] 3s23p3
[Ne] 3s23p1
The decreasing order of the second ionization potential of K, Ca and Ba is
K > Ca > Ba
Ca > Ba > K
Ba > K> Ca
K > Ba > Ca
Out of the following ________ is not isoelectronic.
Mg2+
Cl-
Na+
O2-
Screening power of electrons is in the order
f>d>p>s
s>p>d>f
s>p>f>d
