What is one chemical property of iron? a) iron is malleable. b) the density of iron is 7.86 g/cc. c) iron combines readily with oxygen. d) iron is a good conductor of electricity and heat.

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?