Linked Questions

22
votes
4answers
23k views

Are there colorful metals besides gold and copper?

Are there yellow metals besides gold? Are there metals with color different than yellow and grey/silver or reddish?
32
votes
2answers
29k views

Why is gold unreactive when only one electron is in the outer shell?

I've been trying to answer my (high school) daughter's questions about the periodic table, and the reactivity series, but we keep hitting gaps in my knowledge. So I showed that the noble gases have a ...
22
votes
1answer
21k views

Why does mercury have low melting and boiling points?

Many metals have relatively high melting and boiling points, but mercury has relatively low melting and boiling points. What are the possible reasons for this?
12
votes
3answers
2k views

How fast do electrons move around the nucleus?

Electrons, as we all know, are incredibly small. Smaller things do tend to move faster, right? So exactly how fast considering how small they are? Also, does the electonegativity between two atoms ...
5
votes
3answers
5k views

Why do the trends in reactivity not apply for francium?

Why is francium not included in the reactivity series? Why is potassium considered more reactive than francium? I know that reactivity increases down the group! But why does it not apply here?
12
votes
1answer
5k views

Why is osmium the densest known element?

Why is osmium so dense despite there being heavier elements after it in the periodic table?
8
votes
2answers
3k views

Relativistic effects and lanthanide contraction

So I understand than the lanthanide contraction is due to poor shielding of the 4f electrons which decreases the radius. However, if Im not mistaken the relativistic effects lead to a contraction of ...
8
votes
1answer
4k views

Why doesn't gold corrode? [duplicate]

As the electronic configuration of gold is [Kr] $4d^{10} 4f^{14} 5s^2 5p^6 5d^{10} 6s^1$, the valence shell is not completely full. Why doesn't gold corrode?
9
votes
1answer
708 views

Schrödinger's equation and spin quantum number

As spin quantum number cannot be derived from Schrödinger's equation, it cannot predict opposite electron spin. I mean to ask that how do we obtain the information conveyed by the spin quantum ...
3
votes
1answer
1k views

Why can mercury(I) exist, but not zinc(I)?

Mercury shows variable valency while zinc does not. Its electronic configuration is $\ce{[Xe]\:4f^14 5d^10 6s^2}$. So it can donate the $\ce{6s^2}$ electrons and should only be able to form $\ce{Hg^2+}...
3
votes
1answer
2k views

Why do metals appear lustrous?

I came across a question asking me the reason for the lustrous appearance of many metals. The answer stated that it was due to the presence of free electrons in the metal. But I don't understand how ...
4
votes
2answers
1k views

Why is the periodic table periodic?

I am not a chemist, but I am interested in Science in a general sense. Can anybody explain why the periodic table is periodic in nature? I would appreciate links for further reading.
1
vote
1answer
2k views

Why the ionization energy of Au is more than that of Cu?

As we go down the group from 3d to 5 d, size increases. Vanderwaal radius of Cu and Au is 140pm and 166pm respectively. Since Cu is smaller in size, ionization energy of Cu must be greater. Then ...
-1
votes
2answers
630 views

Can we compare the electron shells with the orbits of the planets around the sun?

Can we compare the electron shells with the orbits of the planets around the Sun, is this a good comparison? Is it true for all the atoms that they can have only 2 electrons on the first shell, but ...
4
votes
1answer
137 views

What chemical properties that allow for colour exist in the dark?

Of course if there's no light around, there's no colour that you can see. On the other hand, the wall must have some property that makes it be blue. That property is still there in the dark. — ...

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