True or False: Without electromagnetic energy, the world as we know it would not exist.

Which is a character of nuclear fusion but not nuclear fission

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

I’m an electrically neutral atomic any element, there are equal numbers of