Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Noble Metal shopping experience:

1. Compare - without doubt the biggest advantage that the Noble Metal offers shoppers today is the ability to compare thousands of Noble Metal at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Noble Metal? Wrong! If the Noble Metal is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Noble Metal then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Noble Metal? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Noble Metal and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Noble Metal wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Noble Metal then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Noble Metal site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Noble Metal, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Noble Metal, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

Noble metals are metals that are resistant to corrosion or oxidation, unlike most base metals. They tend to be precious metals, often due to perceived rarity. Examples include gold, silver, tantalum, platinum, palladium and rhodium.

Some of the noble metals can be dissolved in aqua regia, a highly concentrated mixture of acids.

The term can also be used in a relative sense. A "Galvanic series" is a hierarchy of metals (or other electrically conductive materials, including composites and semimetals) that runs from noble to active, and allows designers to see at a glance how materials will interact in the environment used to generate the series. In this sense of the word, graphite is more noble than silver (even though it is alchemically more base) and the relative nobility of many materials is highly dependent upon context, as for aluminium and stainless steel in conditions of varying pH.

In physics the definition of a noble metal is even more strict. It is required that the atomic orbital of the band structure are filled. Taking this into account, only copper, silver and gold are noble metals, as all d-like band are filled and don't cross the Fermi level. For platinum two d-bands cross the Fermi level, changing its chemical behaviour; it is used (in contrast to e.g. gold) as a catalyst. The different reactivity can easily be seen while preparing clean metal surfaces in vacuum; surfaces of noble metals (e.g. gold) are easy to clean and stay clean for a long time, while those of e.g. platinum or palladium are covered by carbon monoxide very quickly.

External links

• To see which bands cross the Fermi level, the Fermi surfaces of almost all the metals can be found at the Fermi Surface Database
• The following article might also clarify the correlation between band structure and the term noble metal E. Hüger and K. Osuch, Making a noble Metal of Pd, Europhys. Lett., 71 (2005) 276

The pictures do not show most if not all the metals in raw form.

See also

• Base metal
• Synthesis of noble metals

Noble metals are metals that are resistant to corrosion or oxidation, unlike most base metals. They tend to be precious metals, often due to perceived rarity. Examples include gold, silver, tantalum, platinum, palladium and rhodium.

Some of the noble metals can be dissolved in aqua regia, a highly concentrated mixture of acids.

The term can also be used in a relative sense. A "Galvanic series" is a hierarchy of metals (or other electrically conductive materials, including composites and semimetals) that runs from noble to active, and allows designers to see at a glance how materials will interact in the environment used to generate the series. In this sense of the word, graphite is more noble than silver (even though it is alchemically more base) and the relative nobility of many materials is highly dependent upon context, as for aluminium and stainless steel in conditions of varying pH.

In physics the definition of a noble metal is even more strict. It is required that the atomic orbital of the band structure are filled. Taking this into account, only copper, silver and gold are noble metals, as all d-like band are filled and don't cross the Fermi level. For platinum two d-bands cross the Fermi level, changing its chemical behaviour; it is used (in contrast to e.g. gold) as a catalyst. The different reactivity can easily be seen while preparing clean metal surfaces in vacuum; surfaces of noble metals (e.g. gold) are easy to clean and stay clean for a long time, while those of e.g. platinum or palladium are covered by carbon monoxide very quickly.

External links

• To see which bands cross the Fermi level, the Fermi surfaces of almost all the metals can be found at the Fermi Surface Database
• The following article might also clarify the correlation between band structure and the term noble metal E. Hüger and K. Osuch, Making a noble Metal of Pd, Europhys. Lett., 71 (2005) 276

The pictures do not show most if not all the metals in raw form.

See also

• Base metal
• Synthesis of noble metals

Noble metal - Wikipedia, the free encyclopedia
Noble metals are metals that are resistant to corrosion or oxidation, unlike most base metals. They tend to be precious metals, often due to rarity in the crust of the Earth.

Definition: noble metal from Online Medical Dictionary
The Online Medical Dictionary is a searchable dictionary of definitions from medicine, science and technology.

Diamonds Wales - Gemstone & Noble Metal Care
Jewellery Care ... Gemstone & Noble Metal Care. We recommend that you seek professional advice on cleaning all items of jewellery.

noble metal - definition of noble metal by the Free Online Dictionary ...
A metal or alloy, such as gold, that is highly resistant to oxidation and corrosion.

noble metal - Hutchinson encyclopedia article about noble metal
Coin to the value of 6s. 8d. (one half of a mark) issued by Edward III in 1344, along with half-nobles and quarter-nobles. They served as currency for just over 100 years.

Noble Metal Chemical Application - What does NMCA stand for? Acronyms ...
Acronym Definition; NMCA: N-nitrosomethyl-cyclohexylamine: NMCA: nasal minimal cross-sectional area: NMCA: Nation Magazine Cover Archive: NMCA: National Mapping and Cadastral ...

noble metal - What does NOM stand for? Acronyms and abbreviations by ...
Acronym Definition; NOM: Naissance on Melrose: NOM: NAS Operations Manager (FAA) NOM: Nation of Men: NOM: Nationaal Onderzoek Multimedia (Dutch) NOM: National Online Meeting

PhD | Project Details - Nanotechnology of noble metal nanoparticles
Find a PhD is a comprehensive guide to PhD studentships and postgraduate research degrees ... Nanotechnology of noble metal nanoparticles: An EPSRC PhD studentship is available ...

Noble Metal Thermocouples High Temperature Thermal Measurement ...
Noble Metal Thermocouples for high temperature applications that exceed the limits of metal-sheathed thermocouples insulation is the key to durability and stability we only use ...

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Last updated 4/4/98