Atomic Structure Assignment

 1. What does an atom looks like? What are the sub-atomic particles inside it.....(talk about electrons, neutrons, protons, electron shells, nucleus....)

An atom looks like a nucleus surrounded by (an) orbital electron shell/s. The sub-atomic particles within are its protons, neutrons and electrons. Protons and neutrons can be found in the nucleus while electrons are found in its electron shell. Protons are positive (+1 charge) with a relative mass of 1, neutrons are neutral with a relative mass of 1 while electrons are negative (-1 charge) with a relative mass of roughly 1/1840.