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Among the following, the correct statement(s) for electrons in an atom is(are)

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Among the following, the correct statement(s) for electrons in an atom is(are)
aUncertainty principle rules out the existence of definite paths for electrons.
bThe energy of an electron in 2s orbital of an atom is lower than the energy of an electron that is infinitely far away from the nucleus.
cAccording to Bohr’s model, the most negative energy value for an electron is given by n = 1, which corresponds to the most stable orbit.
dAccording to Bohr’s model, the magnitude of velocity of electrons increases with increase in values of n.
✓ Correct answer: a) Uncertainty principle rules out the existence of definite paths for electrons.
ExplanationThus, n=1 will have most negative energy According to Bohr's model, an electron in an atom is located at a definite distance from the nucleus and is revolving with a definite velocity around it.According to Heisenberg's principle, it is impossible to determine simultaneously the exact position and momentum (or velocity) of the electron.Uncertainity principle rules out the existence of definite paths or trajectories of electron and other similar particles.Shell or orbit more near to the nucleus has less energy than far away.As we go farther from nucleus, electrons at higher energy levels have more energy.Option D is incorrect as velocity of an electron varies inversely with 'n', hence, when 'n' increases, velocity decreases.
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