Question

Mention two similarities in the behaviour of be and al to show that they have diagonal relationship

Answer 1

Answer:

Step-by-step explanation:

Diagonal Relationship exists between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. So elements like Be and Al show the diagonal relationship.

Points of similarity between be and al to justify their diagonal relationship are:

-> Both the metals have a tendency to form covalent compounds For ex: chlorides of both metals are covalent.

->Both of them are resistant ot action of acids due to the formation of a protective film of oxides on thier surface

Therefore it is proved that they share a diagonal relationship.

Answer 2

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Beryllium (Be) shows resemblance with its diagonally opposite element Aluminium (Al).

Similarities are:

(1) Both metals have a tendency to form covalent compounds. Example: The chlorides of both being covalent are soluble in organic solvents.

(2) These two elements have same electronegativity and the polarising power i.e. charge/ radius ratio of their ions are very similar.

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