What is an emission spectrum? Does it show the energy that was released or absorbed

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen