Why is platinum inert?

Platinum is an inert metal that is capable of easily absorbing hydrogen. The platinum electrodes do not participate in redox reactions while the cell is working, unlike other metals (such as iron, which can easily oxidize). Pure platinum metal – Platinum is the most ductile of the pure metals.

Why are gold and platinum so unreactive?

Since the 6s orbital with one electron is contracted, this electron is more tightly bound to the nucleus and less available for bonding with other atoms. The 4f and 5d orbitals expand, but can’t be involved in bond formation since they are completely filled. This is why gold is relatively unreactive.

Is platinum a non reactive nonmetal?

Silver, gold, and platinum are metals with the least reactivity. They are found in nature.

Is platinum a hard metal?

Platinum is not a hard metal. It is 4 – 4.5 on the MOHs scale of hardness. This means it can be scratched by anything harder than it is. That’s about the same hardness as your fingernail.

Why is platinum?

Platinum holds diamonds and other gemstones more securely than other precious metals. Platinum is the world’s most precious metal – 30 times more rare than gold. The Perfect Canvas. Platinum’s naturally white color accentuates the beauty of diamonds and other colored gemstones.

Why is platinum used in half cells?

Platinum is used in electrochemical cells because it is resistant to oxidation- it will not easily react, which makes in excellent as an electrode as it will not take part in the Redox reactions occurring in electrochemical cells.

What is the density of platinum?

21.45 g cm-3
Platinum is an element with atomic symbol Pt, atomic number 78, and atomic weight 195.09. Silvery, whitish-gray, malleable, ductile metal. Mp: 1772°C; bp: 2187°C. Density: 21.45 g cm-3 at room conditions (very dense).

How are metals such as gold silver and platinum that are unreactive called?

Key Takeaways: Noble Metal According to this definition, gold, silver, and copper are noble metals. Another definition of a noble metal is one which resists oxidation and corrosion. This excludes copper, but adds in other platinum group metals, such as rhodium, palladium, ruthenium, osmium, and iridium.

Why is silver unreactive?

Silver is a rather unreactive metal. This is because its filled 4d shell is not very effective in shielding the electrostatic forces of attraction from the nucleus to the outermost 5s electron, and hence silver is near the bottom of the electrochemical series (E0(Ag+/Ag) = +0.799 V).

Are metalloids reactive or nonreactive?

The reactivity of the metalloids depends on the element with which they are reacting. For example, boron acts as a nonmetal when reacting with sodium yet as a metal when reacting with fluorine. The boiling points, melting points, and densities of the metalloids vary widely.

Is platinum a reactive metal?

Platinum is rapidly attacked by fused alkali oxides and peroxides and also by fluorine and chlorine at about 500 °C. It is capable of absorbing large volumes of hydrogen, and, with palladium, it is one of the most reactive platinum metals.

What is the reaction between platinum and fluorine?

It reacts vigorously with fluorine at 500 °C (932 °F) to form platinum tetrafluoride. It is also attacked by chlorine, bromine, iodine, and sulfur. Platinum is insoluble in hydrochloric and nitric acid, but dissolves in hot aqua regia (a mixture of nitric and hydrochloric acids), to form chloroplatinic acid, H

What are the physical and chemical properties of platinum?

Physical. The metal has excellent resistance to corrosion, is stable at high temperatures and has stable electrical properties. Platinum does oxidize, forming PtO 2, at 500 °C; this oxide can be easily removed thermally. It reacts vigorously with fluorine at 500 °C (932 °F) to form platinum tetrafluoride.

What is the oxidation state of platinum in jewelry?

Its resistance to wear and tarnish is well suited to use in fine jewellery . The most common oxidation states of platinum are +2 and +4. The +1 and +3 oxidation states are less common, and are often stabilized by metal bonding in bimetallic (or polymetallic) species.

Why is platinum considered to be a noble metal?

It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Consequently, platinum is often found chemically uncombined as native platinum. Because it occurs naturally in the alluvial sands of various rivers, it was first used by pre-Columbian South American natives to produce artifacts.