The groups 1 and 2 on the periodic table contain what atom type? a) metals b) metalloids c) non-metals d) noble gases

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.