Question

Why do the first element of each group show properties different from other elements of the group?

Answer 1

Since they have a small atomic size, they exhibit properties of elements next the elements below them. They are known as bridge elements and have a diagonal relationship.

Answer 2

Hey mate, here's your answer

Anomalous behaviour of 1st elements of each group are due to :

• Small size of atom
• large charge/radius ratio
• high electronegativity
• non availability of d-orbitals in their valence shell.

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