The number of periods in the long form of the periodic table is ___________
Nine
Eighteen
Seven
As many as groups
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
Which of the following contains maximum number of unpaired electrons ?
Co
Ni
Cr
Fe
The physical properties of vanadium are more closely related to that of
Titanium
Tungsten
Niobium
Nobelium
Diagonal relationship is shown by _________
f- block elements
elements of second period
d- block elements
elements of first period
In a given period, the alkali metals have _________
Lowest ionization energy
Smallest atomic size
Highest electron affinity
Lowest density
Chloride of an element 'A' gives neutral solution in water. In the periodic table, the element 'A' belongs to __________
First transition series
Fifth group
Third group
First group
Which of the following is not a Dobereiner triad ?
Li, Na, K
Cl, Br, I
Fe, Co, Ni
Ca, Sr, Ba
The effective nuclear charge of an atom depends upon
atomic number and nuclear charge
shielding effect
atomic number and shielding effect
shielding effect and nuclear charge
The electonegativity of 'Be' is same as that of
Li
Mg
Al
Na