Among the following, the correct statement(s) for electrons in an...

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

Options

AUncertainty principle rules out the existence of definite paths for electrons.
BThe energy of an electron in $2 s$ 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 $\mathrm{n}=1$ , 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.

Step-by-step solution

(1) Uncertainity principle talks about probability of finding electrons in different regions around the nucleus rather than definite paths. (2) With increase in distance of electron from the nucleus, its energy increases. (3) Energy of electron

E_n=-13.6 \times \frac{\mathrm{Z}^2}{\mathrm{n}^2} \mathrm{eV} /

atom. (4) Velocity of electron

V_n=2.19 \times 10^6 \times \frac{Z}{n} \mathrm{~m} / \mathrm{sec}

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