Question

In which periods d block elements are present?

​

Answer 1

Explanation:

The d-block is in the middle of the periodic table and encompasses elements from groups 3 to 12; it starts in the 4th period...

The d-block elements are found in groups 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 of the periodic table; d-block elements are also known as the transition metals. The d orbital is filled with the electronic shell “n-1.”

In transition series the d-orbital is in the filling process. As d-orbital can occupy maximum 10 electrons, so a transition series contain 10 elements. ... This is because the d- sub-shell can occupy only 10 electrons and they get filled up when we move along a period in a series.

hope it helps you...

bye bye

Answer 2

$\huge\boxed{\fcolorbox{yellow}{pin}{Answer}}$

The d-block is in the middle of the periodic table and encompasses elements from groups 3 to 12; it starts in the 4th period.

$\large\tt{\underline{\underline{\orange{Additional \: Info:-}}}}$

• Elements having electrons (1 to 10) present in the d-orbital of the penultimate energy level and in the outer most ‘s’ orbital (1-2) are d block elements. Although electrons do not fill up ‘d’ orbital in the group 12 metals, their chemistry is similar in many ways to that of the preceding groups, and so considered as d block elements.

These elements typically display metallic qualities such as malleability and ductility, high values of electrical conductivity and thermal conductivity, and good tensile strength. There are four series in the d block corresponding to the filling up of 3d, 4d, 5d or 6d orbitals.

• 3d- Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn

• 4d- Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd

• 5d- La, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg

• 6d- incomplete.

There are 10 elements filling up the ‘d’ orbital in each series.

$\large\sf\underline{\red{Hope \:  It  \: Helps \:  You!}}$