What is diagonal relationship?explain its causes.
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Answered by
61
In the second and third periods of the periodic table , diagonal relationship exists between two diagonally adjacent elements. Chemical properties and size of the atom are co related. On moving left to right in a row size decreases and on moving up to downwards size increases. Diagonal relationship between
Li Be
Na Mg
is such that as we go down the column size increases and as we move left to right size decreases thus size of Mg atom is same that of Li.
As you go across the row you add more protons but the electrons are present in the same shell and with each addition of proton this electron shell gets smaller. As we move down the column we are adding protons as well as electronic shells so the size increases.
Li Be
Na Mg
is such that as we go down the column size increases and as we move left to right size decreases thus size of Mg atom is same that of Li.
As you go across the row you add more protons but the electrons are present in the same shell and with each addition of proton this electron shell gets smaller. As we move down the column we are adding protons as well as electronic shells so the size increases.
Answered by
94
In a periodic table, an element of a group in the second period is similar in properties with the second element of next group. This type of relation is called Diagonal relationship
Second period Li Be B C
Third period Na Mg Al Si
Li-Mg
Be-Al
B and Si
Reasons :
Similar atomic size or ionic size
similar electronegativity
Similar polarising power.
Diagonally related elements have same chemical properties.
Second period Li Be B C
Third period Na Mg Al Si
Li-Mg
Be-Al
B and Si
Reasons :
Similar atomic size or ionic size
similar electronegativity
Similar polarising power.
Diagonally related elements have same chemical properties.
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