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.

Filter by
Sorted by
Tagged with
6
votes
1answer
520 views

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 ore ...
5
votes
2answers
2k views

Why does hot steam produce MgO instead of Mg(OH)2?

Background research Magnesium hydroxide exists naturally as brucite (source: wiki) Passing hot steam over magnesium produces magnesium oxide (source: Edexcel's June 2014 Unit 2 exam (CH02_01): ...
5
votes
1answer
69 views

Can I anodize an aluminum coating on steel to have better corrosion inhibition for the steel?

I am planning to coat aluminum on steel and I want to give the steel its maximum corrosion protection. Is anodizing the coating necessary?
5
votes
1answer
166 views

How does radiation facilitate the formation of tetravalent iron?

In reading the article abstract What Oxidation State of Iron Determines the Amethyst Colour?, the author states that in regards to the gemstone amethyst, from clear quartz: The crystal was ...
4
votes
2answers
960 views

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 ...
2
votes
1answer
4k views

Why alkali metals have bcc structure?

It is well known that metals are typically, well, metallic and usually favor the most dense packing, like hcp or fcc cells. This may be easily rationalized as dense packing of metal ions in a sea of ...
16
votes
3answers
6k views

Why did the salt on the skin of my turkey react with the aluminum foil it was touching?

I sprinkled salt on my turkey skin and left it to dry out over night. It was covered with aluminum foil. The next morning the aluminum foil had holes ‘burnt’ in it and the turkey skin turned silver at ...
15
votes
1answer
689 views

What chemical characteristics give types of steel their properties?

I am a mechanical engineer, and just like everyone else I had classes on the crystal structure of metals, phase diagrams, and the various heat treatments. However, even after diving back into that ...
10
votes
2answers
2k views

Brass Instrument: Dezincification or just scrubbed off?

I do own a brass instrument (a trombone). The lacquer is damaged. I asked how to deal with it here. Now I learned that the brass contains zinc, and there is a corrosion process called "...
9
votes
2answers
10k views

Why does mercury not form amalgam with iron?

I am learning about solutions and while giving an example of a liquid (solute) and a solid (solvent), my teacher told us that mercury forms an amalgam with all the metals except iron. I want to know ...
8
votes
1answer
5k views

How is aqua regia stored?

How is aqua regia stored as it dissolves all metals?
8
votes
0answers
383 views

Why does tantalum and tungsten not form amalgam?

User @Poutnik has recently answered a question in which he/she quoted this statement from Wikipedia: Almost all metals can form amalgams with mercury, the notable exceptions being iron, platinum, ...
7
votes
2answers
201 views

How do metals split the oxygen double bond during corrosion?

For a metal like $\ce{Mg}$ to corrode into $\ce{MgO}$, the double bond in $\ce{O2}$ must break. Since the dissociation energy of $\ce{O2}$ is 500 kJ/mol, using estimates from the Boltzmann ...
7
votes
1answer
15k views

Reaction between magnesium metal and sodium hydroxide: Does this even happen?

Came across this question in a book: Among aluminum, zinc, tin and magnesium, which metals (if any) will react with an aqueous solution of sodium hydroxide to displace dihydrogen? The answer to ...
6
votes
2answers
432 views

Is there a characteristic that characterizes all, and only, metals?

The Wikipedia article on metals describes them as elements whose polyatomic configurations* exhibit any one of a number of patterns. I could not discern any property that characterized all the ...
4
votes
2answers
434 views

Will galvanic corrosion happen on a ring made of gold and bronze?

I have recently got a custom-made ring from a jeweler. It’s made from a byzantine-period bronze ring enveloped in a gold bangle. The bronze ring is “glued” onto the gold ring through some kind of ...
4
votes
2answers
2k views

How much pressure does Gallium exert when it freezes?

Assuming the liquid Gallium is in a sealed container, how much pressure will it exert on its container when it freezes?
4
votes
2answers
2k views

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) ...
4
votes
1answer
2k views

Structure of a metal in gas phase

I'm going to use aluminium in my example, but this is applicable to all metals. Aluminium has delocalised electrons. It has aluminium cation -electron attraction. It's easier to visualize the atomic ...
3
votes
3answers
973 views

Is there a method to separate iron from mercury?

The mercury is contaminated with iron. Is there any way to remove iron from mercury?
3
votes
1answer
2k 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 ...
3
votes
1answer
161 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?
3
votes
1answer
279 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 ...
2
votes
2answers
148 views

Do all metal salts in aqueous solution contain metal aquo complexes?

I know that nickel nitrate in aqueous solution contains the metal aquo complex ion $\ce{[Ni(H2O)6]^2+}$. But do all metal salts in aqueous solution contain such complex ions? If not, on what factors ...
1
vote
1answer
2k views

Is it possible to have anions of metals? [duplicate]

I've been wondering if it is possible to have negatively charged metal ions. Most ions tend to have electron configuratons of noble gases. So then is it possible to obtain metal ions from metal atoms ...
1
vote
1answer
286 views

Band MO of Sodium Filling of electrons confusion

I wanted to ask a question about metallic bond - band electron theory. Consider the diagram of Sodium below: Circled are orbitals both containing $2$ electrons each which combine using LCAO to give ...
1
vote
1answer
2k views

Sodium metal in acetone

When I place a chunk of 99,99% pure sodium metal in a beaker of (100% chemically pure) acetone, the sodium metal starts reacting and dissolving into the acetone and it forms a yellow/brown liquid. ...
1
vote
1answer
3k views

What happens to the mobility of Group 1 elements going down the periodic table?

Whilst reading the book, So you want to go to Oxbridge (Third Edition), I noticed that it states that a past question given during an interview for the place on the undergraduate chemistry course (M....
1
vote
0answers
71 views

Why is aluminum oxide resistant to corrosion?

It is common knowledge that aluminum is relatively resistant to corrosion due to its tough oxide layer. The ultrathin (1 nm even) layer is impervious to water and oxygen. What I can't figure out is, ...
1
vote
0answers
5k views

What are the intermolecular and intramolecular forces between Hg molecules/ atoms in liquid mercury? [duplicate]

Mercury is the only metal that is liquid at room temperature. I know that metallic bonding exists between metal atoms but my knowledge is limited to metallic bonding found in solids. Will there be ...
1
vote
4answers
37k views

The Reaction Between Nickel and Hydrochloric Acid

Having conducted an investigation involving multiple metals, I have found that nickel refuses to react with concentrated hydrochloric acid. I have even left the reaction overnight and still have seen ...
1
vote
0answers
2k views

Why do heavy metals like mercury and lead have an affinity for sulfur or sulfur compounds?

Many of the heavy metals such as mercury, lead, thallium, cadmium, and arsenic exert toxic effects largely by binding to or otherwise interfering with organic sulfur compounds or groups in the body. ...
0
votes
0answers
2k views

Why magnesium has the lowest melting and boiling point in its group? [duplicate]

It is written in the third point ( shown in the picture) that presence of d orbitals results in stronger metallic bond. 1) We check the strength of metallic bonding to compare the melting and boiling ...
0
votes
1answer
170 views

To Debunk the 9/11 conspiracy, what is the science behind melting of the towers architecture? [closed]

I am wondering what the chemical validity is of jet fuel actually melting the steel beams that held up the twin towers during the September attacks.

1
2