EPS SCI 3 Lecture Notes - Lecture 2: Foam Peanut, Subatomic Particle, Atomic Mass

• School: UCLA
• Department: Earth, Planetary, and Space Sciences
• Course: EPS SCI 3
• Professor: 5.0 Margot, J.Treude, T.I.

Document Summary

Traces of the beginning of the universe can be observed today. We"ll talk about matter and light, the fundamental forces of nature, and e=mc^2. Galaxies, planets, stars, and people are made of mater. All matter is made of atoms, and the properties of matter depend on the characteristics. The number of atoms in a single drop of water are 10^22-10^23, is comparable to the # of atom of stars in the observable universe. Atomic mass : number of protons and neutrons. Isotopes : same number of protons but different number of neutrons. Protons have a positive electrical charge and neutrons are electrically neutral. An atom with a positive or negative charge is called an ion. Protons but a different number of neutrons. A substance can behave very differently depending if it"s in solid, liquid, or gas phases. They differ in the strength of their bonds between atoms and molecules. Changes in phases depend on t and pressure.