During beta decay an electron emitts from nucleus but there is no electron in nucleus then where it come from??

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Ramya Bhoomi

Chemist

The exited nucleus interact electromagnetically with one of its electron, this causes the ejection of electron from the atom.
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Tutor

It is just not an electron but an electron anti-neutrino is also emitted in a beta minus decay. In beta plus decay a positron and an electron neutrino is emitted. These particles are generated 'in situ' during the nuclear reaction. Please note that this is not a chemical reaction where you need to have...
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It is just not an electron but an electron anti-neutrino is also emitted in a beta minus decay. In beta plus decay a positron and an electron neutrino is emitted. These particles are generated 'in situ' during the nuclear reaction. Please note that this is not a chemical reaction where you need to have an electron for charge sharing or transfer. This being a nuclear reaction, particles are created and destroyed maintaining a balance of spin and energy. read less
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It is actually the neutron that gets splitted up into electron+proton and an energy radiation..and results in the formation of comparatively two stable elements
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Chemistry Wizard/English Expert

From Proton... decay is a type of radioactive decay in which a proton is transformed into a neutron.
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Physics teaching in magical way

Basically in the nucleus of radioactive element neutron undergoes a transition and get converted into proton and electron. Proton remains in nuclei and electron comes out as beta(-ve) or electron. In this decay mass number remains the same but atomic number increases as proton increases n = p+ and...
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"MAKES U SCORE 100/100"

It comes from inside the nucleus only, this happens because of change of a neutron to proton causes the emission of beta rays. Like electron,its negatively charged.
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please read details for this question on this link http://en.wikipedia.org/wiki/Beta_decay
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read details at ths link http://en.wikipedia.org/wiki/Beta_decay
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Very hard working and sincere

Once a neutron is emitted out of the nucleus, it gets converted into a proton and electron. An electron can never reside inside nucleus.
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Physicist in outlook and thought

"Beta minus" decay produces an electron. Reason is neutron decays into a proton, an electron, and an antineutrino. (charge conservation). This newly formed electron is then emitted out.
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