Question

What is the valency of platinum?

Answer 1

Valency can be defined as the number of hydrogen atoms which combine directly or indirectly with one atom of an element. It is simply the combining capacity of an atom of a chemical element. We can say the valency of an element is: equal to the number of valence electrons or equal or equal to the number of electrons required to complete eight electrons in the valence shell of the atom of an element.

Complete answer:
The valency of an element represents the number of bonds that an atom can form as part of a chemical compound. The atomic number of the element platinum in the periodic table is $78$ and its atomic mass is $195$. The electronic configuration of platinum is $[Xe]4{f^{14}}5{d^9}6{s^1}$ . The valency of platinum is $4$ or $2$ . Platinum is dense, ductile, malleable and highly unreactive precious transition metal with a silverish-white color. It is a member of the group $10$ of the modern periodic table. It has $6$ naturally occurring isotopes. It is one of the rarest elements in Earth’s crust. It is one of the least reactive metals and it has a remarkable resistance to corrosion, even at high temperatures. So, it is considered as a noble metal.
Therefore, the valency of platinum is $4$ or $2$ .

Note:
The most common oxidation states of platinum are $+ 2$ and $+ 4$ . The
$+ 1$ and $+ 3$ oxidation states are less common and are stabilized by metal bonding in bimetallic or polymetallic species. Its resistance to wear and tarnish is well suited to use in making jewellery.