Help needed!! Could someone please answer the folloing questions. Plese do give the explanations too 2- What is the energy of the lowest orbital and why? 3- If an electron makes a transition from 2nd to the first orbital than in which of the following particles will the wavelength of the photon released will be the smallest. a) Hydrogen atom b) Deutrium atom c) Helium ion d) bipositive lithium ion.