The outermost electronic configuration of the most electro negative element is
ns2np5
ns2np4
ns2np3
ns2np2
The elements which form anions most readily are
Alkali metals
Halogens
Oxygen family
Nitrogen group
The pair having both members from the same period of the periodic table is
Na,cl
Na, Ca
Ca,Cl
Cl, Br
Diagonal relationship is shown by
f- block elements
elements of second period
d- block elements
elements of first period
The isoelectronic species K+,Cl-,S2- and Ca2+ can be arranged in 'the' decreasing order of their size as
S2-> Cl->K+>Ca2+
Ca2+>K+>Cl->S2-
Cl->S2->K+>Ca2+
S2->Cl->Ca2+> K+
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
Fluorine has low electron affinity than chlorine because of
Bigger radius of fluorine,less density
Smaller radius of chlorine, high density
Smaller radius of fluorine, high density
Smaller radius of chlorine, less density
The element forming an acidic oxide is
C
Ca
Zn
Mg
Similar chemical properties of Zr and Hf may be attributed to
Similar atomic radii
Inert pair effect
Identical ionization energies
similar electronic configuration
