An atom is mostly made up of... * Empty space
Heavy electrons crowding the nucleus
A massive nucleus surrounded by clouds of electrons and protons
A massive nucleus consisting of electrons, protons, and neutrons

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?