[khwcm]

Observe that
⁴α + ⁹Be  ¹⁴N + ^-1β
so,
for the "reactant"(alpha and Be)
there are  6 protons & 7 neutrons together

while for "products"(N and beta)
there are 7 protons and 7 neutrons

why there is a gain of one protons?

[AWK]

⁴α + ⁹Be →¹²C + ¹n
This reaction is used as small neutron source.

Your reaction is evidently wrong

[khwcm]

thats just an example...
if u want real case, i have alots..
₁₄²⁷Si  ₁₃²⁷Al + e
₁₉⁴⁰K + e ₁₈⁴⁰Al

these are those cases with "initial proton No. and neutron No." different from the products one...
i have some more examples..

[DrCMS]

thats just an example...
if u want real case, i have alots..
₁₄²⁷Si  ₁₃²⁷Al + e
₁₉⁴⁰K + e ₁₈⁴⁰Al

these are those cases with "initial proton No. and neutron No." different from the products one...
i have some more examples..

No these are quite different an unlike the first one they are correct

₁₄²⁷Si  ₁₃²⁷Al + e   this is beta decay  http://en.wikipedia.org/wiki/Beta_decay

₁₉⁴⁰K + e ₁₈⁴⁰Al   this is electron capture  http://en.wikipedia.org/wiki/Electron_capture

In your first post the total number of nucleons (protons+neutrons) on either side of the equation were different but in the last two examples the total number of nucleons on either side of the equation is the same.

[khwcm]

but still, for the 2 equation:
just take the first one:
₁₄²⁷Si  ₁₃²⁷Al + e   
protons initial: 14, neutron = 13
protons final: 13, neutron = 14

[sjb]

At a simple level, a neutron is decaying to give a proton and an electron. No contradiction here

[AWK]

₁₈⁴⁰₁₈Al

Al

[DrCMS]

  I'd missed that, should be Ar

[khwcm]

At a simple level, a neutron is decaying to give a proton and an electron. No contradiction here

so is that a proton stored more energy than neutron?

[khwcm]

At a simple level, a neutron is decaying to give a proton and an electron. No contradiction here

umum...one more question
for
₁₄²⁷Si    ₁₃²⁷Al + β
No. of electrons in Si is 14, and that in Al is 13

so, is that the β should come from Si ?
and the proton is just "converted" to a neutron, instead of giving out a neutron and electron?
btw, just interested to know, why the proton will convert to a neutron instead of forming a positively charged Al?

[vmelkon]

"so is that a proton stored more energy than neutron?"

No, the entire nucleus has a lot of energy and by chance, one of the protons turns into a neutron and emits a positron and neutrino.
It is as if you think that beta radiation means an electron is emitted. There are in fact 2 types of beta : beta+ which is a positron and beta- which is an electron.

"27Si = 27Al + beta"

The orbiting electrons don't disappear so the Al atom would have a negative charge.