In a given period, the alkali metals have _________
Lowest ionization energy
Smallest atomic size
Highest electron affinity
Lowest density
Metals, non- metals and metalloids are present in
d- block
f- block
s- block
p- block
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
Incompletely filled orbitals in representative elements are
d-only
f-only
both d and f
s and p
Out of the following the atomic number of the element having highest vapour pressure at room temperature is
Z=25
Z=48
Z=30
Z=80
Amongst the following elements, whose electronic configuration are given below, the one having the highest ionization energy is ____________
[Ar] 3d104s24p3
[Ne] 3s23p2
[Ne] 3s23p3
[Ne] 3s23p1
The pair in which ionisation energy of the first species is less than that of the second is _______
N,P
N,N-
Be+, Be
S,P
Which of the following contains maximum number of unpaired electrons ?
Co
Ni
Cr
Fe
Which of the following is not a Dobereiner triad ?
Li, Na, K
Cl, Br, I
Fe, Co, Ni
Ca, Sr, Ba
The attempt for classifying elements by plotting the atomic weights of elements against the volume was made by _______
Newland
Doebereinier
Mendeleev
Lother Meyer
