How far would it be to the farthest known galaxy (13 billion light-years away)?

Select the atomic models that belong to the same element

List four observations that indicate that a chemical reaction may be taking place

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.