Will mark as
the element aluminum has an atomic number of 13.
how many protons are in the nucleus of an aluminum
how many electrons does an aluminum atom

This is due today and i dont know how to do this. i will give brainiest! research the critical new developments in telescopes, and telescopic lenses. write a 200 word paper on the new developments, describing how these effects the telescopes, and in what environments these work best.