It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Platinum is one of the least reactive metals. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal.

Is platinum more reactive or less reactive?

Platinum, however, is less reactive than copper and so cannot displace copper from a copper sulfate solution.

Is platinum most reactive?

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.

Why are gold and platinum not reactive?

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.

Does platinum react?

Platinum is chemically inert and will not oxidize in air at any temperature. It is resistant to acids and is not attacked by any single mineral acid but dissolves readily in aqua regia. The metal is rapidly attacked by fused alkali oxides and by peroxides and will react with fluorine and, at red heat, with chlorine.

Which metal is less reactive gold or platinum?

Both gold and platinum are known as noble metals. Gold is much more less reactive than platinum. They dissolve in aquaregia ( 3 parts of HCl and 1 part of HNO3).

Which metal is highly reactive?

Caesium, the most reactive metal in the periodic table, reacts extremely violently – hence why it can’t be demonstrated in a classroom! This can be compared to other common metals, such as iron and copper, which produce no reaction when dropped into water.

Which metal is more reactive platinum or gold?

The more reactive the metal, the more rapid the reaction is. Platinum is placed below gold in the reactivity series.

Why is platinum extremely reactive yet aluminum is not?

Platinum is a very inert metal very close to gold in its reactivity! Aluminum is very much more reactive than platinum, although it does form an adherent oxide layer that greatly slows its corrosion. Aluminum is not only soluble in acids, it is also soluble in bases. What does Google know about me?

What makes gold reactive compared to other metals?

Gold is reactive, just not very reactive relative to other metals. It sits very low in the reactivity series with platinum and other ‘noble metals’. All the noble metals (an antiquated term these days) are reactive under the right conditions with the right reagents. Gold is unreactive with water, oxygen and alkalis.

What happens when platinum comes in contact with air?

Edit: the question details mention a reaction when platinum comes in contact with hydrogen and air. This is a well-known reaction where hydrogen catalyzes the combustion of hydrogen, similar to its other hydrogenation activity, producing a flame because of the energetic reaction of hydrogen and oxygen.

How can platinum be used as a reaction catalyst?

Platinum is so stable that it cannot even be attacked by most acids – only the strongest acid solutions, such as aqua regia (a mixture of anhydrous nitric and hydrochloric acids) can cause it to react. It is often preferred as a reaction catalyst for hydrogenation reactions, but never itself participates.