MCQ
The elements having the electronic configuration, [$Kr$] $4{d^{10}}{f^{14}},\,5{s^2}{p^6}{d^2},\,6{s^2}$ belongs to
- A$s$-block
- B$p$-block
- ✓$d$-block
- D$f$-block
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$(A)$ Uncertainty principle rules out the existence of definite paths for electrons.
$(B)$ The 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.
$(C)$ According to Bohr's model, the most negative energy value for an electron is given by $n=1$, which corresponds to the most stable orbit.
$(D)$ According to Bohr's model, the magnitude of velocity of electrons increases with increase in values of $n$.
$4NH_3 + 5O_2 \to 4NO + 6H_2O$
