Questions tagged [atomic-structure]

For questions about the various atomic structure theories, including the Bohr theory. Not to be confused with the actual arrangement of atoms in macroscopic solids ([solid-state-chemistry]) or newer quantum concepts ([quantum-chemistry])

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132 views

What are orbitals actually? [closed]

If s, p, d and f subshells have these kinds of boundary surface diagram, then why don't they include the probability of finding electrons in their preceding shells? As in, if d subshells have ...
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140 views

Software for the atom model of all elements [closed]

I want an atom model with shells but I haven't found one yet and the only software that created an atom was Cinema 4D. This software is not for beginners like me and I used a tutorial to make an atom ...
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53 views

absorption spectrum of hydrogen atom [closed]

In absorption spectrum of hydrogen atom, only one electron is present in its one atom which is in ground state, so it means that all electrons can only absorb energy of photon of wavelength which lies ...
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1answer
72 views

Rutherford experiment [closed]

I am aware that in this experiment originally alpha particles were bombarded on gold foil. But recently I came across a question where this experiment was done with calcium and zinc instead of gold. ...
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1answer
53 views

What element did Rutherford use to obtain alpha particles in his experiment of gold foil? [closed]

What element did Rutherford use to obtain alpha particles in his experiment of gold foil?
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1answer
395 views

Why is a carbon to iodine pi-bond less stable than a carbon to fluorine pi-bond?

This question comes from a second semester undergraduate organic chemistry course. Please refer to the image below with regard to the question. My understanding of the trend in section 4a is that "...
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1answer
90 views

why would an alpha particle ejects neutron when bombarded on berreylium? [closed]

when an alpha particle hit berrelyium it emits neutron. Does the alpha particle causes unstability to the nucleus or any other reason?
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1answer
74 views

Bohr's postulate of quantisation of angular momentum

The Bohr's postulate of quantisation of angular momentum can be written in a formula as $mvr = nh/(2π)$ where $m$ is mass of electron $v$ is its velocity $r$ is the radius of that shell $h$ is ...
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1answer
248 views

To move one electron in one H atom from the ground state to the second excited state, 12.084 eV are needed

How much energy is needed to cause 1 mole of H atoms to undergo this transition Assume Bohr's model of quantisation The energy for transition is $$1312\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)$$ ...
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351 views

Slope of Graph of Wave Number vs inverse square of the principal quantum number(1/n^2) in Hydrogen Emission spectrum

What is the final expression we get for wave number in a hydrogen emission spectrum? Let us say for example from 6 to an orbit $n$. Considering that it is an emission spectrum, I think it would be ...
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1answer
26 views

How value of energy of elecron becomes more negative and radius of orbit decreases with increase in the value of atomic number? [closed]

I know how energy of elecron and radius of orbit depends upon principal quantum number......But how it depends upon atomic number?
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2answers
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Finding atomic number given energies of emitted photons

A hydrogen-like atom (atomic number $Z$) is in a higher excited state of quantum number $n$. This excited atom can make a transition to the first excited state by successively emitting two photons of ...
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1answer
453 views

What is more stable, Na+ or Na? [closed]

As per noble gas configuration $\ce{Na+}$ should be more stable than $\ce{Na}$. But at the same time $\ce{Na+}$ has a positive charge so it will be easily attracted by negative charge while $\ce{Na}$ ...
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1answer
2k views

No. Of minimum Hydrogen atoms [closed]

No. Of minimum Hydrogen atoms required to observe maximum no. Of distinct spectral lines when electron jumps from O shell to K shell? My attempt - Total no. Of spectral lines = (5*4)/2= 10 = no. Of ...
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3answers
66 views

Does the 4s orbital really have a higher energy level compared to 3d? [duplicate]

For writing the electronic configuration of the $\ce{Fe^2+}$ ion, you need to remove two electrons (as it is an ion) which are from the highest energy level. Apparently, this would be $\mathrm{4s}$ ...
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1answer
218 views

Atomic structure [closed]

We've got a homework and I know this question may seem so primitive, but I have already read whole textbook and I've been looking also on the Internet, but I still cannot find the right answer. I'd be ...
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0answers
15 views

What is s block/p block/d block substance? [closed]

I have heard only s block/p block/d block elements.I don't know their definition? Could ypu explain that for me,please?
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2answers
1k views

positive rays ?? (What and why)

Question : We were recently studying the chapter on Atomic Structure and we had a topic about cathode rays and the single particle of a cathode ray is called cathode ray particle. The next topic ...
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1answer
312 views

Which principle goes against the concept of Bohr's fixed orbits? [closed]

Can you also state the principle which goes against it?
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1answer
446 views

Radial probability curve [closed]

Can somebody give me a clue on how to solve the question in the picture for me given below
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0answers
44 views

Do atoms gain or lose all the electrons at once or one by one? [closed]

We all know atoms gain or lose electrons to attain stability. So, my question is: Do they lose or gain all the electrons(to be donated or gained) at once or step by step i.e, one by one? For example: ...
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0answers
33 views

Diagrams for the wave functions [closed]

I came across a question in one of the papers of JEE Advanced, which i didn't understand. The question is as follows: $P$ is the probability of finding the $\mathrm{1s}$ electron of hydrogen atom in ...
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0answers
37 views

Does f orbital participate in bonding? [closed]

It is known this question has been asked before but the is no satisfactory answer. Can anyone explain why there are no hybrid f orbitals? Clarifying, the question is wether f orbitals can participate ...
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1answer
44 views

Lanthanum Electronic Configuration [duplicate]

Lanthanum has electronic configuration [$\ce{Xe}$] $4\mathrm{f}^0$ $5\mathrm{d}^1$ $6\mathrm{s}^2$. Why is the $4\mathrm f$ sub-shell not filled even though we know that $4\mathrm f$ is filled before $...
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1answer
87 views

What is the real structure of atom showing every ORBITAL [closed]

Since the Bohr's atomic model was rejected and new concept of orbital was introduced so what is the real structure of an atom showing each and every orbital?
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2answers
179 views

Bohr energy formula for a single-electron system

A single electron atom has nuclear charge $+Ze$ where $Z$ is atomic number and e is electronic charge requires $\pu{16.52ev}$ to excite the electron from the second bohr orbit to third bohr orbit. ...
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2answers
270 views

Why is atomic number unique? [closed]

We all know that atomic number of an atom is "unique" just like fingerprint. And no two elements can have same atomic number. But how can we be So sure that no two elements can have same atomic number?...

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