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Oxidation of the metal
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∙ 10y ago
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Why do metals often lose their shine and appear dull?
Most metals lose their luster when they are exposed to water because they react with the oxygen in the water and oxidize. An example is iron that reacts with the water to produce iron oxide, or rust.
What metal never rusts or lose its shine or tarnish?
which material does not loses its shine. Is gold
Why does gold not lose its shine but other metals do?
It does not rust or tarnish because gold will not chemically combine with any substances in the air
Do metals prefer to receive electrons in chemical reactions?
Yes. Metals lose their valence electrons to form cations, or positive ions. Once they lose electrons, the number of protons in their nuclei outnumber the electrons, hence the positive charge.
Do alkali metals tend to gain or lose electrons?
Alkali metals tend to lose electrons in chemical reactions.
Why do vessels made of metals lose shine after few days?
Most metals lose their shine as they react with gases in the atmosphere or in a liquid.. The surface layer may react to fom an oxide, hydrated oxides, sulfide, sulfates, carbonates. Generally ths process makes the surface dull and it may get pitted. The process is called corrosion when it is iron rusting and tarnishing when it is silver forming black silver sulfide or copper forming a mixture of greenish products, "patina" whose composition depends on the location.Some metals do not lose their shine. Common examples are gold and platinum which are used as jewellery. Aluminium still looks shiny but there is thin layer of aluminium oxide which prevents the reactive aluminium metal from corroding.
Why do metals often lose their shine and appear dull?
Most metals lose their luster when they are exposed to water because they react with the oxygen in the water and oxidize. An example is iron that reacts with the water to produce iron oxide, or rust.
What do very reactive metals lose?
Reactive metals lose electrons when being oxidised.
What metal never rusts or lose its shine or tarnish?
which material does not loses its shine. Is gold
When metals lose electrons what do they form?
Metals lose electrons and form cations to get a full octet.
Are metals always shiny?
No. None of the Group 1 and Group 2 elements of the periodic table, the alkali and alkali earth metals respectively, stay shiny when exposed to air. They all react with moisture in air, and they tarnish quickly. A number of other metals will not stay shiny, either. Iron can be polished, but it will oxidize (rust) if left in air. Some metals will not react with air or the moisture in it, and some will. The results are mixed in that there are a lot of transition metals (Groups 3 through 12 on the periodic table), and each one would have to be evaluated independently (or with its "group mates") to discover if it would stay shiny. Links are provided to some relevant Wikipedia articles. The links are to the groups of metals, and each element in the Group chart is a hyperlink to that element. It should make it easy to do a quick search of the metals to get a complete answer, if that is what is desired.
Why does gold not lose its shine but other metals do?
It does not rust or tarnish because gold will not chemically combine with any substances in the air
Why do metals tend to lose electrons to form positive?
Metals tend to lose electrons to form positive ions because, for metals to gain a full outer shell, they need to lose electrons.
Do metals prefer to receive electrons in chemical reactions?
Yes. Metals lose their valence electrons to form cations, or positive ions. Once they lose electrons, the number of protons in their nuclei outnumber the electrons, hence the positive charge.
What do valence electrons in metals do?
Metals lose electrons in a chemical reaction.
Do atoms of metallic elements tend to gain or lose electrons?
Metals usually lose electrons, this is why many charges are positive.
What makes a star lose its shine?
runs out of fuel to fuse
