5. Calculate the emission energy for an electron transition from n=4 to the n=8 level in a hydrogen atom.

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

What’s #16 asking me and how do i solve it?

An atom that has gained or lost electrons is called an _