another actual dat question from 1990

[yahoogoogle]

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the B decay of the unstable nuclide C(superscript 14, subscript 6) which is used in radiocarbon dating is represented by

C(14/6) = N(14/7) + Beta (0/-1) + v

the neutrino v contains

1. a proton
2. a neutron
3. excess energy
4. an electron
5. a beta particle

 

[joonkimdds]

the B decay of the unstable nuclide C(superscript 14, subscript 6) which is used in radiocarbon dating is represented by

C(14/6) = N(14/7) + Beta (0/-1) + v

the neutrino v contains

1. a proton
2. a neutron
3. excess energy
4. an electron
5. a beta particle

I think i learned it in physics class...i just can't remember what v is....
i think it's either 3,4 or 5 😛
wait....maybe 1 or 2....

 

[bxs023100]

i think its excess energy

 

[JackAsstror]

Where do you get these questions from

 

[joonkimdds]

I think i learned this from Physics class that
it releases something depends on what kind of decay it undergoes.

 

[yahoogoogle]

the answer is 4. i think it's wrong

 

[zed350]

the B decay of the unstable nuclide C(superscript 14, subscript 6) which is used in radiocarbon dating is represented by

C(14/6) = N(14/7) + Beta (0/-1) + v

the neutrino v contains

1. a proton
2. a neutron
3. excess energy
4. an electron
5. a beta particle

3. Excess energy or gamma particles as they are called

 

[keibee82]

the B decay of the unstable nuclide C(superscript 14, subscript 6) which is used in radiocarbon dating is represented by

C(14/6) = N(14/7) + Beta (0/-1) + v

the neutrino v contains

1. a proton
2. a neutron
3. excess energy
4. an electron
5. a beta particle

Isn't the answer #2 a neutron?

 

[DentalKitty]

the answer is 4. i think it's wrong

I think it looks wrong too. Beta decay is where a neutron decays into a proton and an electron. The Atomic Mass stays the same (-1n, +1p), and the Atomic Number increases by one (+1p). A neutrino is also released in Beta or Positron decay, but is is a chargeless and virtually massless particle. If you add up the AM and the AN on both sides you'll see it is already balanced, therefore, the neutrino would only consist of energy.

 

[jdmsamurai]

no its excessive energy....

when beta particles are emitted (beta minus or beta positive) and they release extra energy (gamma))...

read up on PET scan where beta particles annihlate each other and release GAMMA rays

 

[DentalKitty]

no its excessive energy....

when beta particles are emitted (beta minus or beta positive) and they release extra energy (gamma))...

read up on PET scan where beta particles annihlate each other and release GAMMA rays

Ok, good! I was worried I'd gotten mixed up or something 🙂

 

[joonkimdds]

I think the answer is #2. neutron.
Beta decay means neutron becomes a proton and then it releases electron and anti-neutrino.
We know that proton number increased by 1 and electron is released.
This is all because of the beta decay process that the neutron was changed into proton.
That's why i think it should release the neutron and the answer is 2. neutron.

But I don't understand why the question is asking what the neutrino is.
If it was beta+ decay, which makes proton into neutron then we call it neutrino.
if it was beta- decay, which makes neutron into proton then we call it
anti-neutrino.
The equation shows that this is beta- decay so it has to be called anti-neutrino instead of neutrino unless I am wrong.

antineutrinos and neutrinos are neutral particles (from wikipedia) and I know that neutron is neutral so i believe
2 is the answer.
Could someone plz read what i just wrote and tell me if i am correct or not?

 

[DentalKitty]

I think the answer is #2. neutron.
Beta decay means neutron becomes a proton and then it releases electron and anti-neutrino.
We know that proton number increased by 1 and electron is released.
This is all because of the beta decay process that the neutron was changed into proton.
That's why i think it should release the neutron and the answer is 2. neutron.

But I don't understand why the question is asking what the neutrino is.
If it was beta+ decay, which makes proton into neutron then we call it neutrino.
if it was beta- decay, which makes neutron into proton then we call it
anti-neutrino.
The equation shows that this is beta- decay so it has to be called anti-neutrino instead of neutrino unless I am wrong.

antineutrinos and neutrinos are neutral particles (from wikipedia) and I know that neutron is neutral so i believe
2 is the answer.
Could someone plz read what i just wrote and tell me if i am correct or not?

No, you are not correct. Add up each side:

14=14+0+x x=0
6=7+(-1)+y y=0

Therefore, v has an atomic mass of 0 and an atomic number of 0 so it must consist of only energy. That is all they are asking here (what is v, the neutrino, made of). A neutron would have an atomic mass of 1 and would not give you the correct arithmetic. Yes, a neutron was converted into a proton and an electron, but those components have already been accounted for in the N and the B particle.