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

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Does metal oxidize (faster) in dirt?

I had an interesting event occur recently: I stuck a screwdriver in a potted plant, for it is the only way that I am able to unlock a certain door. It was left in there for about a month before I ...
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51 views

Why are some metals ferromagnetic?

Why is Iron or Nickel magnetic? Iron has metallic bonds. And a metallic bond is the electrostatic attraction between the positive metal ions and delocalized electrons. Is it because of these ...
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25 views

Copper and Hydrochloric Acid: Reaction or No Reaction? [duplicate]

In my chemistry lab, we had $18$ different reactions involving many different substances. One of the experiments involved placing a piece of copper metal in a hydrochloric acid. While observing it ...
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49 views

How to temper a non-ferrous metal

Can non-ferrous metals/alloys (copper, brass, bronze) be tempered (made harder) by temperature control alone, like ferrous metals? I understand it's simple to anneal copper, brass, etc., just by ...
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26 views

Kinetics of the conversion from metal oxide to metal hydroxide in water

How long can a metal oxide such as magnesium oxide remain in solution before being converted to the metal hydroxide?
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99 views

Making metal powders using electrolysis - chosing the right electrolyte

Really fine metal powders are good for two things: making paints and pyrotechnics. For this purposes, I can see people usually use thing called ball mill. It's basically a barell stuffed with heavy ...
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46 views

what is the chemistry behind amalgamation?

Mercury can form amalgams with metals, such as gold, however how exactly does the "reaction" if you can call it that take place? My understanding of metal bonds is that the atoms of a metal are ...
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38 views

Solution, hardener and metal required to cast key duplicates

I just watched this YouTube video for a DIY key duplication system and was trying to figure out what all the material components could be: The "mold solution" (parts 1 and 2) The "hardener" The "low ...
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50 views

Is there a systematic way to determine the expected cubic structure of metals?

I've noticed that some groups of metals with similar properties tend to belong to the same cubic structure group, such as $\text{FCC, BCC, or HCP}$. What is a good explanation as to why these metals ...
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Turn lead into gold via radioactive decay

I was looking at the isotope's table and noticed that one of Lead's isotopes can actually turn into stable gold through this mechanism : ...
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36 views

Common etchant for Stainless Steel 304L and Titanium Grade 2

I need a common etchant for S.S. and $\ce{Ti}$. Right now I'm using: $\ce{HNO3 + 3HCl}$ - for S.S. 304L $5\%~\ce{HCl} + 6\%~\ce{HNO3} + 16\%~\ce{HF} + 74\%~\ce{H2O}$ - for $\ce{Ti}$ Is it possible ...
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81 views

What are the properties of alloys?

You spend a lot of time in chemistry talking about molecular amd ionic compounds, but I'm interested in what you can do with metals only. What is the difference between the properties (physical & ...
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23 views

Crystal structure in function of pressure

If you were to investigate crystal structure changes as a function of pressure, which metals would you study first? Last? Why?
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32 views

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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1answer
74 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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3answers
104 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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77 views

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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26 views

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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43 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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116 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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72 views

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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58 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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42 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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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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87 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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29 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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79 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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198 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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153 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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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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1k 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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259 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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457 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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673 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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720 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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206 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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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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121 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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444 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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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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3k 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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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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509 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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577 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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2k 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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527 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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772 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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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?