Scientist
{"name":"Scientist", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"A. Developed the theory of universal gravitation; how the force that pulls two objects together depends on the mass of each object. Applied this theory to the planets' places in the universe., B. Studied the structure of atoms and introduced the model that atoms have a positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus...similar to our solar system.","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}