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

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Butane blowtorch condensing liquid on heating surface

I have a small Butane blowtorch, and use it to heat an Aluminium plate. The plate is thick so takes 20 seconds or so to really start heating up. As soon as I apply the heat, droplets of some liquid ...
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29 views

Filter based on density of an object

Would it be possible to make a filter based on density of an object ? Would do a great lot of help.
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45 views

Which metals with high density do not react with mercury?

I would like to know the highest density material between 10-17 g/mol range that is less than mercury and does not react with mercury. Also would I like to know the highest density metal that is in ...
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55 views

Which electrodes do not corrode at all?

I had used spare pieces of metal to perform electrolysis. They all had the disadvantage that they corrode when used as anode - and some of the oxides are toxic (copper, chromium). I've found that ...
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I heard aluminium doesn't produce fumes when burnt but the opposite happened, how?

One day I took aluminium foil(sanitary brand, don't know if you've heard it) then I casually burned it over a gas lighter then it burned and gave off Grey fumes and the foil became a dull Grey ...
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Properties of powdered metals

I have seen certain metals such as Aluminium used in a situation where it is in a powdered form and "compacted" into a shape under intense pressure (in a mould), and it ends up looking mostly like ...
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26 views

Why is Technetium unstable?

Technetium is probably the most awkward element of the periodic table for me. It seems to me that Technetium is an exception, in the sense that it doesn't have any stable isotopes, despite having a ...
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45 views

Does a patina on a knife prevent rust?

Before I begin, I think it's worth mentioning that I know little about chemistry and even less about knives. My question is this, having seen many people talk about how patinas work and the best ...
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Are metallic/ionic bonds weaker than covalent bonds? I was taught the opposite. Now I'm confused

In mineralogy class, I was taught that metallic and ionic bonds are weaker than covalent bonds and that's why quartz and diamond have such a high hardness value. However, in organic chemistry class, I ...
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Elemental Silver Colour

What is the colour of elemental Ag? I have doubt whether it is black or silver in colour. In Tollens' test, we get a silvery precipitate of elemental silver - hence silver in colour. I have read ...
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which metal helps in cold rolling of stainless steel

Which metal and in what composition , help in expansion of stainless steel in cold rolling .
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16 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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28 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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39 views

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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66 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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27 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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53 views

A metal that melts quickly?

Is there a kind of metal that melts very quickly with very low heat or temperature and at the same time becomes hard very quickly? I'm very naive in chemistry with limited knowledge. So I hope your ...
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178 views

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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126 views

Classifying atoms as metals or nonmetals based on the periodic table [closed]

The electron configuration of the outer shell of four atoms are: $X: 3s^23p^3, Y: 6s^26p^3, Z: 3s^23p^4 T: 6s^26p^4$. I don't know if these atoms are metal or nonmetal. Please classify the four ...
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67 views

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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285 views

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} $ ...
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154 views

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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328 views

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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188 views

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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207 views

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, ...
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131 views

My gallium is not melting

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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53 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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86 views

Are there enzymes found in nature or the man made world that can help 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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208 views

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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140 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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991 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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69 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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279 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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447 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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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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306 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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508 views

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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326 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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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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124 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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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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188 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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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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88 views

How to remove Sn from $\ce{Sn60Cu40}$ 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 ...
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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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89 views

Are metals hydrogen bond acceptors or donors?

In a carbonyl or -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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60 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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115 views

How does Caesium's density change with temperature?

According to Wikipedia Caesium's density is 1,90 g/cm3 at T=20 °C. How does this change when T changes? E.g. will it expand when melting?
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Is At a non metal or a metalloid?

Is Astatine a non metal or a metalloid? A metalloid is an element which exhibits some of the properties of a metal as well as those of a non metal.