The subshell in which the last electron enters decides the block to which an element belongs.
In group 1 and group 2 elements, the last electron is filled in the s...
The general outer electronic configuration of the d-block elements is ns0-2 (n-1)d1-10 while the general outer electronic configuration of the f-block elements is ns2 (n-1)d0-1 (n-2)f1-14.
s-Block elements:
s-Block contains group 1 and group 2 elements.
It contains only metals.
The last electron in the s-block elements enters in s orbital.
General outer electronic configuration of s-block elements is ns1-2.
e.g....
d-Block elements:
d-Block contains elements from group 3 to group 12.
It is present in the middle of the modern periodic table.
They are also known as transition elements.
The last electron in the...
Chemical reactivity of elements depends on the ease with which it attains electronic configuration of the nearest inert gas by gaining or losing electrons.
The elements preceding an inert gas react...
Sr. no.
Property
Down a group
i
Atomic radii
Increases
ii
Ionic radii
Increases
iii
Ionization enthalpy
Decreases
iv
Electronegativity
Decreases
v
Standard reduction potential
Decreases
