The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is that:
The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is that:
The correct option is D the ratio of their charge to size is nearly the same
A Diagonal
Relationship is said to exist between certain pairs of diagonally adjacent
elements in the second and third periods of the periodic table. These pairs (Li
& Mg, Be & Al, B & Si etc.) exhibit similar properties; for
example, Boron and Silicon are both semiconductors, form halides that are
hydrolyzed in water and have acidic oxides. Such a relationship occurs
because crossing and descending the periodic table have opposing effects. On
crossing a period of the periodic table, the size of the atoms decreases, and
on descending a group the size of the atoms increases. Similarly, on moving
along the period
the elements become progressively more
covalent, less reducing and more electronegative, whereas on descending the
group the elements become more ionic, more basic and less electronegative.
Thus, on both descending a group and crossing by one element the changes cancel
each other out, and elements with similar properties which have similar
chemistry are often found - the atomic size, electronegativity, properties of
compounds (and so forth) of the diagonal members are similar.
The chemistry
of lithium is very similar to that of magnesium even though they are placed in
different groups. Its reason is that the ratio of their
charge to size is nearly the same
A Diagonal Relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. These pairs (Li & Mg, Be & Al, B & Si etc.) exhibit similar properties; for example, Boron and Silicon are both semiconductors, form halides that are hydrolyzed in water and have acidic oxides. Such a relationship occurs because crossing and descending the periodic table have opposing effects. On crossing a period of the periodic table, the size of the atoms decreases, and on descending a group the size of the atoms increases. Similarly, on moving along the period
the elements become progressively more covalent, less reducing and more electronegative, whereas on descending the group the elements become more ionic, more basic and less electronegative. Thus, on both descending a group and crossing by one element the changes cancel each other out, and elements with similar properties which have similar chemistry are often found - the atomic size, electronegativity, properties of compounds (and so forth) of the diagonal members are similar.
The chemistry of lithium is very similar to that of magnesium even though they are placed in different groups. Its reason is that the ratio of their charge to size is nearly the same
