If $$\Delta x$$ is the uncertainty in position and $$\Delta v$$ is the uncertainty in velocity of a particle are equal, the correct expression for uncertainty in momentum for the same particle is

The number of radial nodes and angular nodes of a $$4 f$$-orbital are respectively

The number of protons, neutrons and electrons in $$_6^{13}$$C respectively are

The masses of an electron, a proton and a neutron respectively will be n the ratio