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α-particles are not dangerous if they are incorporated because their RBE is 20 (T/F)
False
Protons and neutrons consist of two quarks each. (T/F)
False
3 quarks
Electron waves are standing waves in every situation. (T/F)
False
free electrons can have every wavelength
In a β+ -decay neutrons change to protons, electrons, and anti-neutrino.
False
beta+ delivers positron
The product of the momentum and the place of an electron is zero or bigger. (T/F)
False
only bigger not 0
The value of the wave function is a measure of electron density. (T/F)
False
Nuclear fission is the splitting of heavy nuclei to produce light nuclei.
True
Excited gases emit a line spectrum. (T/F)
True
To describe an orbital, three quantum numbers are necessary. (T/F)
True
4th one is spin (nothing to do with orbital)
-> for electrons need 4
All elemental particles obey Pauli’s exclusion principle. (T/F)
False
bosons dont obey exclusion principle, only the ones with half spin obey
The wavelength of a particle is proportional to its mass. (T/F)
False
it is inversely proportional
The course of a radioactive decay of a certain unstable nuclide cannot be influenced by whatever means. (T/F)
True
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