CHEM 111 Chapter Notes - Chapter 2: Cathode Ray Tube, Unified Atomic Mass Unit, Subatomic Particle

• School: College of Charleston
• Department: Chemistry and Biochemistry
• Course: CHEM 111
• Professor: Deavor

Document Summary

When a chemical reaction takes place, matter is neither created nor destroyed. All samples of a given compound have the same mass ratio of their constituent elements. In families of chemical substances, the mass ratio of elements between two compounds is always a whole number multiple. A collective term for protons, neutrons, and electrons. A glass tube sealed under vacuum to which current is applied to electrodes placed at either end of the tube, producing a beam of charged particles. A beam of charged particles emitted from a cathode ray tube. A negatively charged subatomic particle found in the space about the nucleus. A positively charged subatomic particle found in the nucleus. The core of an atom; made up of protons and neutrons. The unit of a scale of relative atomic masses of the elements; (1u = 1/12) of the mass of a carbon atom with six protons and six neutrons.