It is known that atom contain protons, neutrons and electrons. If the mass of neutron is assumed to half of its original value where as that of proton is assumed to be twice of its original value then the atomic mass of : ${}_6{}^{14}\mathrm{C}$ will be :-

Give the correct order of initials $\mathrm{T}$ (true) or $\mathrm{F}$ (false) for following statements :-
$\left(\mathrm{I}\right)$ If an ion has $2$ electrons in $\mathrm{K}$ shell, $8$ electrons in $\mathrm{L}$ shell and $6$ electrons in $\mathrm{M}$ shell, then number of $\mathrm{S}$ electrons present in that element is $6.$

$\left(\mathrm{II}\right)$ The maximum number of electrons in a subshell is given by $2{\mathrm{n}}^2$
$\left(\mathrm{III}\right)$ If electron has magnetic quantam number $-1,$ then it cannot be present in $\mathrm{s}-$orbital.
$\left(\mathrm{IV}\right)$ Only one radial node is present in $3\mathrm{p}$ orbital.

An electron in a hydrogen atom in its ground state absorbs energy equal to ionisation energy of ${\mathrm{Li}}^{+2}.$ The wavelength of the emitted electron is :-

Given: Planck's constant $=6.62\times {10}^{-34}\mathrm{Js}$, mass of electron $=9.1\times {10}^{-31}\mathrm{kg}$, Ionisation energy of hydrogen ${\mathrm{IE}}_{\mathrm{H}}=2.18\times {10}^{-19}\mathrm{J}/\mathrm{atom}$

The correct order of decreasing energy of these electrons is :