The wavelength of electrons accelerated from rest through a potential difference of 40 kV is x $$\times$$ 10^$$-$$12 m. The value of x is ___________. (Nearest integer)

Give : Mass of electron = 9.1 $$\times$$ 10^$$-$$31 kg

Charge on an electron = 1.6 $$\times$$ 10^$$-$$19 C

Planck's constant = 6.63 $$\times$$ 10^$$-$$34 Js

The Azimuthal quantum number for the valence electrons of Ga⁺ ion is ___________.

(Atomic number of Ga = 31)

In the ground state of atomic Fe(Z = 26), the spin-only magnetic moment is ____________ $$\times$$ 10^$$-$$1 BM. (Round off to the Nearest Integer). [Given : $$\sqrt 3 $$ = 1.73, $$\sqrt 2 $$ = 1.41 ]

A certain orbital has n = 4 and m_L = $$-$$3. The number of radial nodes in this orbital is ____________. (Round off to the Nearest Integer).