An atom has electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s², you will place it in

Zn gives H₂ gas with H₂SO₄ and HCl but not with HNO₃ because

$${}_{92}^{235}$$U, nucleus absorbs a neutron and distintegrate in $${}_{54}^{139}$$Xe, $${}_{38}^{94}$$Sr and $$x$$ so, what will be product $$x$$?

Atomic number of Cr and Fe are respectively 24 and 26, which of the following is paramagetic with the spin of electron?