Questions tagged [metal]

For questions about metals in general and their physical or chemical properties. For characteristic properties and reactions of d and f block metals specifically, use the [transition-metals] and [rare-earth-elements] tags respectively instead.

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640 views

Percentage of carbon in stainless steel to avoid brittleness

What is the maximum percentage of carbon allowed in stainless steel 202 so that it does not cause brittleness?
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1answer
73 views

What type of material is this and how is it corroding?

So I was thinking about corrosion and I came across this structure(see image) Do you think the inner metal/alloy that is corroding is steel? Also, what do you think the outer layer (in white) is? ...
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2answers
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Does corrosion follow the law of conservation of mass?

For e.g .Due to rusting , iron becomes weak .So it should become weak only if the amount of iron is reduced. Even if we say the reduced iron is now the rust ,the amount of rust practically is very ...
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1answer
644 views

How to separate lead condensate from aluminum

A common problem in shooting sports is precipitation of lead onto aluminum suppressor baffles. (The lead presumably comes from both lead styphnate priming compound and from the base and bearing ...
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1answer
36 views

Controlling the shape of metal

Is there a way to control the shape of metal? Suppose I have a fast melting metal, is there a way to make it take a specific shape? Of course I don't mean to like put it in a template to take the ...
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3answers
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Is there a metal that melts and solidifies quickly?

Is there any kind of metal that melts very quickly with very low heat or temperature, and at the same time, becomes hard very quickly?
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2answers
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can an alloy be used to make another alloy?

The answer is likely very obvious but I know pretty much nothing about this so: Can I make an alloy, using an alloy? That is, could I make an alloy of steel (in itself an alloy of iron and carbon) ...
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1answer
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Extraction of nickel from its ores [closed]

How is nickel mined and extracted from its ores? What are the appropriate word and chemical equations for this process?
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2answers
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How to treat Magnesium powder and ribbon

I am a master student of nuclear physics. Due to some measurements I'd like to make, I have to use Magnesium as a beam target. Searching through the net to see it's properties I found that it can be ...
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1answer
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Why does HNO3 not give off H2 when reacting with Cu?

A dilute solution of which acid is most likely to produce a reduction product other than $\ce{H_{2}}$ when it reacts with a metal? (A) $\ce{HF}$ (B) $\ce{HCl}$ (C) $\ce{HNO3} $ (D) $\ce{H2SO4}$ $\...
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2answers
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Why does gold react with cyanide and sodium hydroxide

Why does gold react with cyanide and sodium hydroxide and what is the chemical reaction's impact on gold's atomic structure and bonding? What I think is since in the 'flotation' process, when the ...
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1answer
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Gold's atomic structure and bonding in relation to the separation techniques used

How is Gold's atomic structure and bonding related to the separation techniques used to distinguish it from other substances? I'm just confused on what I'm actually searching for, I have read so ...
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2answers
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What is the smell of 'burning' metal?

When a pass a construction site where someone is welding two pieces of metal together there is a very distinct smell that I associate with 'burning' metal, although I am not quite sure it is burning ...
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2answers
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Why does the 3rd electron shell start filling up with scandium?

The electron configuration of calcium is 2, 8, 8, 2, where up to that point each shell, asides from the first shell counts up to 8 - why then does scandium have an electron configuration of 2, 8, 9, 2?...
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4answers
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My sample of gallium does not melt

I held gallium under a heat lamp. It didn't melt. I didn't even find a thin film of liquid gallium. Can anyone explain why? Does gallium rust?
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1answer
235 views

Why is the maximum % for a gold alloy 92%?

The assignment question is asking us to explain why you can't get more than 92% gold in a gold alloy, and I can't seem to find out why it's specifically 92% in either the textbook or online. Any ...
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1answer
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Are there natural or artificial enzymes that break down metals?

Do natural or human engineered enzymes exist that can speed up the break down metals (element, compounds & alloys)? If no, then what biological or chemical construct can break down metals in the ...
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1answer
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How is titanium metal obtained from natural resources?

How does titanium occur in nature? Is it available as a native metal or only in the form of ores? Which precesses are typically used to convert the natural resources to the solid metal? Any hints ...
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2answers
1k views

If “Gas” belongs to “State of Matter” then what does “Metal” belong to?

My question is, if "gas" belongs to "State of Matter" then what does "Metal" belong to. Gas can be substituted with any state of matter(in the analogy); metal can be substituted with metalloid or ...
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1answer
61k views

Why can we smell copper?

If I can smell an object, it means that molecules of it are getting separated from it, so they can reach my nose. As far as I know, metals don't sublimate, especially not in room temperature. However, ...
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2answers
303 views

What does Cobaltous Oxide form with metal oxides?

I'm searching for the products to the following reactions: $$\ce{CoO + MgO -> } \small\text{(cobalt pink)}$$ $$\ce{CoO + SnO -> } \small\text{(cobalt green)}$$ I know that corresponding ...
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1answer
12k views

Calculating percentages of microstructures in equilibrium phase diagrams (engineering)

So I have an equilibrium phase diagram of steel and I am asked to 'Calculate the proportion of pearlite in the microstructure of 0.4 wt% C steel just below the eutectoid temperature (727 °C).' I have ...
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2answers
3k views

Why sponge can't absorb mercury

Recently I have watched a video demonstration with a sponge and mercury and the sponge can't absorb mercury like it does with water. Why is that?
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4answers
33k views

Why are there free electrons in a metal?

Recently, we covered metallic bonding in chemistry, and frankly, I understood little. I understand that: Metals bond to each other via metallic bonding Electricity can flow via free or ...
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5answers
37k views

Which has more metallic character: aluminium or magnesium?

Which element has more metallic character - aluminium or magnesium? I know that metallic character decreases along a period (from left to right) and increases down a group. Aluminium comes after ...
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4answers
9k views

Does Zinc become black & dull after reacting with dil. HCl?

In the reaction where $\ce{Zn}$ reacts with $\ce{HCl}$ to give off Hydrogen gas & Zinc Chloride solution, does the zinc turn a dull black color after a while? If so, why?
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1answer
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Why is AlMg3 called aluminum alloy?

In AlMg3, magnesium atoms outnumber aluminum atoms by a factor of three. In terms of mass, the ratio of aluminium to magnesium is a mere $27.0 / (3\times24.3) = 0.37$. Shouldn't AlMg3 be better ...
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2answers
3k views

Do you break the metallic bond when you break a metal into two pieces?

As we all know, metallic ions are surrounded by a sea of electrons. If we continually bend or stretch a metal, say, iron, it will break. Does that mean we break the metallic bond in subatomic level?
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Have we ever created artificial metals?

I really don't know anything about chemistry, but I was wondering about the following vague question: has any substance been created that does not contain any metallic elements, but is metallic? In ...
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5answers
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Why don't metals form covalent bonds in bulk metal?

I really don't understand why metals form metallic bonds. I mean, it makes no sense. It would make much more sense for them to form covalent bonds with themselves and have a 'pseudo-full' outer shell. ...
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1answer
305 views

How can silver work as a disinfectant in a bathtub if precipitates in the presence of chloride?

I use a silver based disinfectant in my hot tub. It is in the form of silver nitrate beads. There is chlorine in the tub that I presume becomes chloride ion. Why doesn't the silver form a precipitate ...
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1answer
426 views

Consequences of using reagent preserved with sodium azide on gold film

I am running experiments using reagents preserved with 0.1% sodium azide, which are applied to a gold film. Unfortunately, there are very few options for using reagents without sodium azide. I ...
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2answers
14k views

Why does sodium react with water?

The reaction of sodium with water is quite infamous. $\ce{2Na + 2H_2O \rightarrow 2NaOH + H_2}$ But exactly why does $\ce{Na}$ displace $\ce H$ in $\ce{H_2O}$?
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1answer
111 views

Cathodic protection of active metals

Cathodic protection prevents the removal of positive form the metal surface by applying a negative charge to the metal. Is is possible to prevent the reaction of an active metal (i.e. sodium) with ...
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2answers
867 views

How to remove Sn from Sn60Cu40 alloy?

I have practical question. How can I chemically remove $\ce{Sn}$ from $\ce{Sn60Cu40}$ alloy? I want to get something like copper sponge this way. Something like nanoporous gold produced from $\ce{...
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3answers
608 views

If copper has started to corrode, can it stop?

I've recently obtained a couple of electronics units which have suffered corrosion on their copper inductor coils. They were operated in conditions of intense humidity/heat and were placed near the ...
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2answers
607 views

Are metals hydrogen bond acceptors or donors?

In a carbonyl or $\ce{-OH}$ group, it's clear the oxygen acts as a hydrogen bond acceptor. Do metals act as hydrogen bond acceptors or donors and if so, how can I tell as what it's acting?
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1answer
160 views

Are there any free electrons in metal vapor?

Metals contain free moving electrons, in both the solid and liquid state. Does this happen when it is in vapor form?
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3answers
331 views

How does caesium’s density change with temperature?

According to Wikipedia caesium’s density is $1.90\ \mathrm{g/cm^3}$ at $\Theta =20\ \mathrm{^\circ C}$. How does this change when $T$ changes? E.g. will it expand when melting?
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1answer
154 views

Metal extraction by pyrolysis

There is a process named solar furnace pyrolysis which is used to reduce the oxides of various elements by concentrating solar energy. Oxygen is liberated but an oxide slag is left. $$\ce{SiO2 ->[...
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3answers
69k views

What is charge density?

For example, Magnesium has a higher charge density compared to Sodium, therefore its metallic lattice is stronger and it has a higher melting point. Does that mean that Magnesium has more protons and ...
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3answers
3k views

Completely chemically inert metal alloy?

Background: I was a chemistry major and have recently started watching this series of videos by NurdRage. I learned that Platinum dissolves in Aqua Regia but Ruthenium is only attacked by high ...
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1answer
103 views

Alloy-component weight based on desired molecule

I'm a gold smith and I want to start experimenting with non-standard metal-alloys. Now high school is a long time ago for me so while I think I've got this right, I'm just not as sure as I should be ...
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3answers
6k views

Alloys for inkless metal pen

What alloys can be used to make a metal pencil like this one?
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1answer
5k views

Treatment of copper (0) with sodium hydroxide

I recently made self-assembled monolayers (SAMs) of alkanethiols on a copper substrate. After scrubbing off the $\ce{Cu2O}$ top layer and rubbing the surface with ether and ethanol, I let my copper ...
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1answer
132 views

Materials used in metallic glass

I've been looking over the lists of materials used together to make metallic glass. Is it purely coincidental that if you round up/down any decimals from the atomic weight of elements used to ...
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3answers
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Why does polonium form acidic oxides?

All metals form basic oxides. Metallic oxides are basic in character. Polonium is a metal, so it should form basic oxides but it forms acidic oxides. Why are its oxides acidic in character?
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1answer
2k views

Galvanic corrosion between nickel brass nut and stainless bolt

I am planning to install something on a boat that will be in salt water, and my question is, will the nickel plated brass fastener not corrode if I connect it to stainless steel? I looked it up on ...
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2answers
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Why does Chloride attack CrO?

In certain applications some sorts of stainless steel (V2A, 1.4301) corrode when exposed to $\small{\ce{Cl^-}}$ in water, or at least it is strongly advised to use ...
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1answer
480 views

Mercury, amalgams and mercury compounds [closed]

Mercury is toxic. It forms amalgams and inorganic mercury compounds/salts are available. My question is on toxicity. I am interested in its toxicity, not the mode of action (as it will be part of ...

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