A metal is an element, compound, or alloy that is a good conductor of both electricity and heat.

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Is there any way to refine Feldspar?

Feldspars are mostly composed of three compounds: KAlSi$_3$O$_8$ NaAlSi$_3$O$_8$ CaAl$_2$Si$_2$O$_8$ I notice they each have Aluminum. Feldspar is far more common than Bauxite (the only Aluminum ...
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59 views

What causes metallic objects to ring?

If I use a iron rod to hit a 3" × 12" iron plate there is the distinct sound of a metallic ring. What is the cause of this distinct sound? Is it the crystal structure of iron or that iron is a ...
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59 views

Is a substance's band gap related to it's flame test colour?

This is really not my field at all, but I am intruiged by the cause of different metals emitting different wavelengths of light. To my knowledge, the more energy needed to "excite" an electron, the ...
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56 views

Why is platinum an excellent catalyst in comparison with similar metals? [duplicate]

What is special about platinum structure which actively participate in catalytic reactions while similar metals with similar atomic structures cannot.
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Why is the melting point of magnesium anomalous? [duplicate]

The melting and boiling points for the Group II elements are as follows: $$\begin{array}{ccc} \text{Element} & \text{Melting point / }\mathrm{^\circ C} \\ \hline \ce{Be} & 1289 \\ \ce{Mg} ...
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What reactions does this steel cold-bluing solution undergo?

Bluing steel generally refers to the process of forming a protective layer of $\ce{Fe_3O_4}$ ("black iron oxide") that prevents normal rust from forming. The chemistry behind the traditional ...
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How to determine pH of food in order to avoid unsuitable storage containers

In an acidic (lemon-containing) sauce I had placed a metallic spoon. A few days later it had a metallic taste. Stainless steal might be a significant source of nickel, chromium and iron [1]. Also, ...
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58 views

Bond Type of Lead: Metallic or Network Covalent?

I know that lead is classified as a metal, from its appearance, nonexistent band gap, and its position on the periodic table... etc. However, all of the elements above it (carbon, silicon, germanium, ...
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21 views

Basis of structural change of tin | Tin pest

What is underlying molecular intuition for the phenomenom of tin pest where tin under 13°C undergoes change in its crystal structure? Is the idea same as freezing of water, where atoms lose their ...
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24 views

What is this black substance coating the brass after soaking with acid?

I have a radiator with a brass chamber and H90 brass tubes that I wanted to clean(if I remembered correctly there was just a few black spots on that chamber) , so I poured a bit of white vinegar and ...
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Do there exist metals that are composed of molecules?

Most metals are composed of pure elements or are alloys (mixtures of pure elements.) Are there metals that are composed of one type of molecule that is metallically bonded together? The difference ...
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84 views

Why are metals conductive in terms of orbitals?

Back in high school I was taught a definition of metals: Metals are a lattice of positive nuclei embedded within a sea of delocalised electrons Metals are conductive because the electrons aren't ...
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Trends in conductivity in groups 1 and 2

I have read that the trend for conductivity in groups 1 and 2 is a decrease down the groups (generally). Apparently this is because the atoms of each element get larger, so while the number of ...
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33 views

Why is silver nitrate used for cyanide titration?

Or more to the point, since silver isn't exactly cheap: Why can't cuprous nitrate ($\ce{CuNO3}$) substitute for the pricier ($\ce{AgNO3}$) in cyanide titration? I assume that free cyanides bind ...
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74 views

Which compound reacts with calcium oxide

Originally, I thought this question was asking for reactivity. So I thought since sodium is higher in the reactivity series (or have a more negative standard electrode potential) than Ca, then it ...
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54 views

How to check purity of Mercury metal

Mercury is a very good solvent for many metals. We have mercury metal available, how do we check for its purity? Is there some kind of test available to verify its purity? and more helpfully which ...
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Why is mercury's surface tension so high, when its viscosity is low?

At a basic level, both surface tension and viscosity are the result of forces between particles. Usually we'd talk about intermolecular forces, because liquids are usually molecules, but obviously ...
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the longevity of amorphous metal

I gathered that many of amorphous solids are made by quickly cooling the liquid material, thereby giving it no time to form any long-range order (crystallinity). So it makes a perfect sense that when ...
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How does vinegar get rust off these coins

As experiment I found some really nasty rusty coins on the street. They were green. After looking on a website I found vinegar could eliminate the rust. It worked pretty well. I know this is a redox ...
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36 views

Why do polymers have higher coefficients of linear thermal expansion than metals?

What started out as a homework question is now bothering my brain. I have always known that metals expand pretty well when their temperatures increase. Also, I have never heard of polymers like Teflon ...
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24 views

Can copper, nickel and chrome plating process only be done with HCl solution?

I want to know if electroplating process can only be done with HCl acid, without any copper, nickel , zinc and chrome liquid solutions? means equipment DC battery anode rode (zinc, copper, nickel ...
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84 views

Does mercury amalgamate with Brass or Steel?

Does mercury amalgamate with Brass & Steel ? Details: I am designing a micro pump to dispense mercury in micro quantities (300 - 700 mg). I am planning to use 2 check valves with syringe to suck ...
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Relative etch rates of nitric acid on metals and oxides

I am trying to either find or calculate the etch rate of nitric acid ($\ce{HNO3}$) for various different metals and oxides. The ones I am interested in are titanium ($\ce{Ti}$), zirconium ($\ce{Zr}$), ...
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Enthalpy of Formation of Alkali Metal Halides [duplicate]

A book that I am currently reading contains the following lines :- The Enthalpy of formation for fluorides become less negative as we go down the group, whilst the reverse is true for the Enthalpy ...
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59 views

Calcium reactivity vs electronic configuration

Calcium is an alkaline earth metal, so it is reactive. But, it has two valence electrons. Don't those two electrons fill up the first energy level? Isn't an atom with a full energy level considered ...
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Would tin (II) sulfide be considered a covalent network solid?

Considering that tin has a Pauling electronegativity of 1.96 and sulphur 2.58, and that a bond is considered to be ionic with a Pauling EN difference of approx. 1.7 at the least, would tin (II) ...
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Why does dry boiling discolor steel cookware?

I have a stainless steel kettle that I let boil dry. That is, I left it on a hot coil burner with nothing in it, and noticed a few minutes later that the bottom was red hot and smoking. To make ...
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How does a metal atom's size affect the electrical conductivity of it's giant metallic structure?

In giant metallic structures, how does a metal atom's size affect the structure's electrical conductivity? (i.e. what happens if you go down a group of metal elements?)
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Can 2 pieces of metals combine after long time contact?

Does 2 pieces of metals combine automatically after long time contact because of atom vibration and collision and finally form metallic bonds between the contact surface?
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How are the boiling points of Tungsten and other metals determined and proved?

The boiling point of Tungsten is 10,030 degrees Fahrenheit. How was this determined and proved? And more generally how are the boiling points of metals determined and proved? Is it really so simple ...
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147 views

Why do we say metals are monoatomic in nature?

Are metals monoatomic or polyatomic in nature? For in crystalline form they also form molecular orbitals.
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How does the electron configuration of platinum relate to its stability?

Does platinum's electron configuration, [Xe] 4f14 5d9 6s1, influence its reactivity and stability? Is the electron configuration the primary contributing factor to platinum's relative inertness? ...
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60 views

Heavy Metal Toxicity [closed]

Ok, so I am working on a project where I have to make a tax for manufacturers using non recyclable materials. So for this tax you multiply the weight (in kg) by how toxic the material is, this gives ...
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Lattice structures, Metallic Bonding

How and under what circumstances can cations form a lattice structure? Would they not repel each other?
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What is the difference between galvanization and sacrificial protection?

If we use zinc in both methods, then the same process occurs: zinc corrodes in preference to iron, and eventually zinc has to be replaced. So what's the difference?
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Why are overcoats used on aluminum if aluminum oxide forms on surface anyway?

If a thin layer of aluminum oxide is formed on the surface of aluminum to prevent further oxidization, why are optical components using extra "overcoat" materials to prevent dulling of the metal over ...
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Metallic bonding and covalent boding

Why do metallic bonds have delocalized electrons, whereas covalent bonds only share electrons? Does it have something to with the atomic masses of the individual non/metals or something else? I'm ...
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Generally, why are some metal elements more reactive than others? [duplicate]

I have just read that reactive metal elements are extracted through electrolysis, however, less reactive metals are extracted through a reaction with carbon or carbon monoxide. In both cases the ...
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Why is gold so popular in nanotechnology?

Gold is a very popular metal in nanotechnology. It is often used as a substrate in electronic applications, as a core of functionalized nanoparticles, and more. Why is gold so attractive? Why are ...
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25 views

Spectroscopy and Excitation of Electrons

As metals are heated, they glow white and then blue. How might you explain this change in color as the temperature of the metal is increased? My answer consist of the idea that with increased thermal ...
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What metals can be melted inertly in alumina crucible? [closed]

Specifically, a crucible made from 90+% Aluminum Oxide. What metals can be melted in it without any weird reaction taking place?
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Is there a way of dissolving metals in water and then coating something?

I'm wondering if I could dissolve a metal in water and then have it coat an object that I place in the water? The object would somehow have to attract the metal.
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Are there general rules for Base + Metal Compound reactions like there are for Acids?

Are there general rules for Base + Metal Compound reactions like there are for Acids? For example, acids have some general rules. ** Acid + Metal => Salt + Hydrogen Gas Acid + Metal Carbonate => ...
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883 views

How do I find the diameter of an Aluminum atom? [closed]

I am supposed to find the diameter of an Aluminum atom using data given by my teacher. Here is the data: ...
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705 views

How do I calculate the cost of a single Aluminum atom?

I am doing a Chemistry assignment in which I was given a piece of aluminum foil which I had to measure and use for my calculations. I am supposed to calculate the cost of a single aluminum atom using ...
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108 views

Why does mercury form polycations?

For example, mercury (I) is $\ce{Hg2^2+}$ and not $\ce{Hg+}$. What causes the stability in covalently bonded $\ce{Hg}$ ions? Are there any other metals that also bond covalently?
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Why doesn't my stainless steel Thermos get really really hot?

Why doesn't my stainless steel Thermos get really really hot? Seems like a fairly straightforward question. A few notes: I was looking and found (obviously different values because steel is an ...
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63 views

Does Photoelectric effect occur in a micro-oven while heating food? [closed]

Does the photoelectric effect occur while heating food on a metal plate in a microwave oven? If not, then why doesn't it occur?
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144 views

How to test for heavy metal in water?

Is there a way to test if water has toxic heavy metals. Samples to both the water and people who drink it are available. Preferably, it should be done with at hold materials. I could also borrow ...
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Do only metals form ions?

Do nonmetals form ions? I am asking this because I was reading something and I came across the phrase "metal ions," which left me to wonder whether or not there are nonmetal ions as well.