Questions tagged [nuclear-chemistry]

This tag should be applied to questions about processes where elemental compositions are changed due to nuclear reactions.

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Hydrogen different ionization energies [closed]

I have found an article on a magazine which states that the ionization spectrum of parahydrogen is different than the ionization spectrum of orthohydrogen. I thought why this happens and I concluded ...
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53 views

X-ray bombardment of CaCl2 and its resultant chemical changes

If one were to take $\pu{1 mol}$ of pure liquid Calcium Chloride (at $\pu{600 ^\circ C}$) and bombard it with $\pu{7.65 \times 10^{14} Ci}$ ($\pu{2.83 \times 10^25 particles}$) of x-rays ($\pu{75 keV}$...
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1answer
53 views

Gamma spectrometry

I want to calculate minimum detectable activity (MDA) at 200 and 300 keV energy of a gamma spectrometry by HPGe detector. 662 keV Photopeak is present for 137Cs. Assume 2 scenarios: There is a 'peak'...
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1answer
8k views

What caused the flashes in the video footage of Chernobyl?

There is video footage of nearby villages in Pripyat, in the first week after the Chernobyl disaster. When I watch it there are villagers leading normal lives in normal clothing. Some Russian nuclear ...
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2answers
66 views

Nuclear Fusion and Fission

When a heavy nucleus undergoes nuclear fission , it splits to two smaller, more stable nuclei and produces heat, similarly, when two light nuclei fuse, to make a heavier, more stable nucleus and ...
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1answer
171 views

What makes an isotope stable? [closed]

I have heard many times that when there is the “right balance” of protons and neutrons the atom will be stable, and therefore it will decay to achieve this stability. But what about this supposed ...
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1answer
138 views

Band of stability

Here’s the band of stability as it appears in my textbook: 1- My textbook states that the last stable atom is Pb-206 and every element that has an atomic number greater than 82 is radioactive. But if ...
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2answers
84 views

Fluorine isotopes and isomers [closed]

I was looking up fluorine isotopes out of curiosity. The Wikipedia entry gives info on them but adds there are also two isomers which are $\mathrm{^{18m}F}$ and $\mathrm{^{26m}F}$. What is an isomer ...
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55 views

Effect of spontaneous transmutation of atom in crystal

What happens to a compound when one of its atoms changes via spontaneous nuclear reaction to an atom with very different bonding? For example, beryllium-7 turns into lithium-7 with a half-life of 53 ...
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1answer
57 views

Nuclear chemistry home made [closed]

A boy in Memphis built 1 year ago a nuclear fusion reactor at his home . How did he achieve so high temperatures in order for the fusion to take place?The fusion that took place was 2 atoms of ...
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1answer
199 views

Nuclear equations for the decay of radon-222 to lead-206 [closed]

I have to answer this on my worksheet. I understand nuclear chemistry equations a bit, as well as the process of alpha decay and somewhat about what happens when an atom changes its number of protons ...
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1answer
46 views

Collison of two alpha particlesre

I was reading on nuclear chemistry - in particular, the bombardment of nuclei with alpha-particles - and was wondering what the effect of $\ce{^4_2He + ^4_2He -> ^8_4Be}$ would be. My instinct ...
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2answers
77 views

Why does atomic charge not balance in nuclear reactions?

In the discovery of neutron, the bombardment of beryllium with alpha particles is well known. $$\ce{^9_4Be + ^4_2He^2+ -> ^12_6C + ^0_1n}$$ I don't understand how the electrons add up. As alpha ...
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1answer
100 views

Nuclear Fusion and the worlds water supply

First off, I'm probably missing an important part of the argument regarding nuclear fusion. What I think I know about it; Nuclear fusion (using heat instead of gravity) is taking Deuterium and ...
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1answer
30 views

Would then base react with water? [closed]

Imagine you fill a tank with undecayed neutrons and water .Now neutrons will decay into proton and electrons. Assume that the wall of the container is so thick that it doesn't allow the protons to ...
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1answer
213 views

How does protium fusion produce helium? [closed]

In stellar nucleosynthesis, how is helium produced from a protium atom that has no neutrons?
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1answer
109 views

Separating specific components of a PUREX raffinate

The PUREX extraction in nuclear fuel reprocessing leaves behind a nitric acid raffinate full of (mainly) 'fission products', which are a diverse set of elements produced by fission in a nuclear ...
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1answer
804 views

Which element has the highest binding energy per nucleon

The graph of binding energy per nucleon (Hyperphysics) seems to peak at Iron-56. However, Wikipedia says that Nickel-62 has the highest binding energy per nucleon of any known nuclide (8.7945 MeV). ...
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1answer
55 views

Regularity of electron configuration for heavier atoms [closed]

Edit: Is there structure in the nucleus that might be responsible for part of the regularity of the (ground-state) Aufbau process? The periodic addition of electrons is more than one might naively ...
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2answers
88 views

How much ionising radiation is released during an atomic blast?

I've been looking for how much ionising radiation is produced during an atomic blast (as a percentage). I have seen a claim of 5% of the energy in an atomic blast is ionising energy (Wikipedia), but ...
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74 views

As an atom get's bigger (on increasing atomic no.) , electrons have to move faster and faster around the nucleus, Why?

Does speed even make sense at such small scales ? Heisenbergs Uncertainty principle ?
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1answer
25 views

Unstable or radioactive as a property?

What is better term for describing a chemical element; "radioactive" or "unstable"? I am leaning towards the "unstable", because it seems to me that it better describes nature of the element, as ...
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1answer
81 views

How does beta decay increases the stabilization of the nuclei?

How does beta emission by a nuclei increases the general stability of it? I surely am not a specialist or anything, but this just don't make sense to me, since the objective of radiation is to release ...
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2answers
92 views

how to display diffusion to a young audience?

I need to display some science topic pertaining to the atomic bombs, or atomic history in some way to children of approximately middle school level. So I've decided that something interesting to cover ...
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0answers
46 views

Is it plausible to draw an enthalpy diagram for a nuclear reaction? [closed]

For a project I am required to draw a enthalpy diagram for the conversion of thorium-232 to uranium-233 and I am unsure on how to proceed. I understand a certain amount of energy is lost through beta ...
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1answer
104 views

Why can't a reverse fission reaction be automatically classified as a nuclear fusion reaction?

$$\ce{_2^4He + _13^27Al -> _15^30P + _0^1n}$$ Will this reaction qualify as a nuclear fusion reaction? The answer to this question in the test says that it won't, yet it seems to be the reverse of ...
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1k views

Is it possible to speed up radioactive decay?

I’m aware that elements like $\ce{^14C}$ have a known half-life, which means that over a span of roughly $5730$ years, half of the $\ce{^14C}$ atoms decay into $\ce{^14N}$. Are there any substances ...
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1answer
398 views

Why do Alpha particles not collide with electrons during alpha decay? [duplicate]

Alpha particles are positively charged, so my question is that during alpha decay, when these are released from the nucleus, why doesn't it ever occur that they collide and grab an electron or two ...
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3answers
910 views

Can you decay to half an atom?

In school we are learning about half-life, and I was wondering if it is possible to decay to half an atom?
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2answers
294 views

Could you make a helium atom from hydrogen gas? [closed]

Hydrogen gas is $\ce{H2}$, and contains 2 electrons and 2 protons. My question is, with sufficient pressure, could you fire two neutrons at the molecule and have them form a single Helium atom?
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1answer
1k views

Can't silver have 61 neutrons? [closed]

What happens if silver does have 61 neutrons?
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3answers
29k views

Is iron the most stable element in the periodic table?

According to the binding energy per nucleon vs mass number graph, it is observed that iron-56 has the maximum value of binding energy per nucleon ($\pu{8.75 MeV}$). It means that iron-56 is the most ...
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1answer
662 views

Container to minimise radiation exposure from U-238

Consider a sample of uranium-238 that is undergoing decay to thorium-234. During the transmutation, a gamma ray is emitted from the nucleus. However, the thorium-234 daughter particle does not decay ...
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1answer
3k views

Why are the masses of atoms less than the sum of their subatomic particles?

The mass of carbon-12 is $\pu{12 u}$ by definition. However, one carbon-12 atom comprises 6 neutrons (each weighing $\pu{1.0087 u}$), 6 protons (each weighing $\pu{1.0072 u}$), and 6 electrons (each ...
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2answers
277 views

What is the reason behind choosing the specific elements used for the synthesis of heavier elements?

The following has been derived from the wiki page "Extended periodic table" and is one of the many examples d or f block elements being used in synthesizing new heavier elements (or at least this is ...
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4answers
560 views

Can nuclear fission or fusion occur together with bond formation in a reaction?

Is it possible for a nuclear reaction to occur simultaneously with a chemical reaction involving bond formation? Can anyone suggest an example of this, please?