Question

The groups from 3 to 12 are present in a)s-block b)p-block c)d-block d)f-block

Answer 1

Answer:

The groups from 3 to 12 are present in

(c) d-block

Answer 2

Answer:

$\Large{\underline{\underline{\bf{Option\:C:d-block}}}}$

Explanation:

→ The groups from 3 to 12 are placed under the d block elements.

→ The general electronic configuration is  $(n-1)d^{x} \:ns^{y}$

   where x = 1 to 10 (except 4 and 9)

              y = 1 or 2 (number of electrons present in ns orbital)

→ They are placed between the s block and p block elements.

→ The elements of d block are all metals and show variable property.

→ They are also called as the transition elements.

→ The valence electron enters in one of the inner d orbitals.

More Information:

→ Transition metals are defined as metals which have incomplete d subshell either in the gaseous atom or in their respective ions.

→ The electronic configuration of Zn, Cd, Hg and Cn are given by (n-1) d¹⁰ns², that is completely filled d orbitals. Hence they are not considered as transition metals.

→They have properties such as variety of oxidation states, formation of coloured ions and complex ormation with ligands.

→They exhibit catalytic property.

→ They are paramagnetic in nature.

→ They have high tensile strength, ductility, malleability , high thermal and electrical conductivity just like typical metals.

→ They are very hard and have low volatilty.

→ They have high melting and boiling points.