What is diagonal relationship ? Give two examples to illustrate the concept ?
A diagonal relationship in S-block elements exists between adjacent
elements which are located in the second and third period of the
periodic table.
For example, Lithium of group 1A and second period shows
similarities with the properties of magnesium which are located in the
2nd group and 3rd period. Similarly, properties of beryllium which are
located in 2nd group and 2nd period show a likeness with properties of
aluminum which is located in the third period and third group. The two
elements which show similarities in their properties can be called a
diagonal pair or diagonal neighbors.
The properties of these elements
vary significantly when compared to the other elements of the sub-group
they belong to. The diagonal neighbors show a lot of similarities. Such a
relationship is exhibited as you move left to right and down the group;
the periodic table has opposing factors.
For example, the electronegativity
of the elements increases as we go across the period and decreases as
we go down the group. Therefore when it is moved diagonally the opposite
tendencies cancel out and the value of electronegativity almost remains
same.
A diagonal relationship in S-block elements exists between adjacent elements which are located in the second and third period of the periodic table.
For example, Lithium of group 1A and second period shows
similarities with the properties of magnesium which are located in the
2nd group and 3rd period. Similarly, properties of beryllium which are
located in 2nd group and 2nd period show a likeness with properties of
aluminum which is located in the third period and third group. The two
elements which show similarities in their properties can be called a
diagonal pair or diagonal neighbors.
The properties of these elements
vary significantly when compared to the other elements of the sub-group
they belong to. The diagonal neighbors show a lot of similarities. Such a
relationship is exhibited as you move left to right and down the group;
the periodic table has opposing factors.
For example, the electronegativity of the elements increases as we go across the period and decreases as we go down the group. Therefore when it is moved diagonally the opposite tendencies cancel out and the value of electronegativity almost remains same.
