Beta is produced by the weak nuclear force.
The leptons do not preexist in the nucleus, their wavelength would be too long for that.
I think you are confused when you say "contain no elements". No nucleus contains elements, the nucleus is part of an atom and atoms are part of elements & compounds.
Perhaps you meant to say "contain no electrons". If so you are right, see above. The leptons (electron, positron, neutrinos) are created by a decay process mediated by the weak nuclear force.
No.
Nucleus that causes a neutron to change into a proton is called a beta particle.
An unstable nucleus (radioactive isotope) may emit: alpha particles, beta particles, gamma radiations, electrons, positrons, X-rays, and neutrons, depending on which nucleus is doing the emitting.
beta particle In beta decay a neutron is converted into a proton, electron (also called a beta particle) and an electron antineutrino.
Beta radiation does not have a helium nucleus.Alpha radiation, however, does have a helium nucleus.
No.
Those elements which don't very stable nucleus tend to be radioactive.Some isotopes of elements are radioactive in nature like Tritium(an isotope of hydrogen) and isotopes of cobalt are radioactive.Apart from the isotopes, many heavier elements(most of the trans-uranium elements) are radioactive in nature.An element having unstable nuclei(generally after being formed by alpha or beta decay) tends to attain a stable nucleus by gamma decay and emits radiation in the process.All of the alpha, beta and gamma decay give out harmful radiations with gamma rays being most dangerous due to their highest penetrating power.
No, not all radiation is electromagnetic radiation, though some is. Exceptions: Neutron radiation - Emission of neutrons. Alpha decay - Emission of a helium-4 nucleus (2 protons and 2 neutrons). Beta radiation - Emission of electrons.
beta
Uranium-238 emits alpha radiation; its half-life is 4,468×109 year.
Nucleus that causes a neutron to change into a proton is called a beta particle.
An unstable nucleus (radioactive isotope) may emit: alpha particles, beta particles, gamma radiations, electrons, positrons, X-rays, and neutrons, depending on which nucleus is doing the emitting.
Beta radiation does not have a helium nucleus.Alpha radiation, however, does have a helium nucleus.
beacause, beta radiation is not strong enough to go trough metal.
beta particle In beta decay a neutron is converted into a proton, electron (also called a beta particle) and an electron antineutrino.
Ionizing radiations are alpha, beta, gamma rays, etc.
Applications of promethium: - beta radiation source in instruments used to measure thickness of coatings by retrodiffusion of beta radiations - luminous paints - atomic batteries