EVSC 1010 Lecture Notes - Lecture 1: Thermal Energy, Chemical Equation, Chemical Reaction

• School: University of Virginia
• Department: Environmental Sciences
• Course: EVSC 1010
• Professor: Thomas Smith

Document Summary

Matter: anything that has mass & volume (takes up space) Atom: smallest particle w unique chem characteristics of element. Structure= protons (+), neurons (no electrical charge), electrons (-; orbit around nucleus) Net electrical charge= 0 when equal # of electrons & protons; subtract protons from electrons. Atomic #: # of protons in nuclei. Atomic mass: total mass of protons, neurons & electrons in atom. Ion: atom/molecule that lost/gained electrons w +- electrical charge. Isotope: element variants w diff #s of neurons. Radioactive decay: process where nuclei of unstable isotopes lose subatomic particles forming element w lower atomic mass. Compound: atoms + ions (molecule w 2 diff elements) Chemical bond- force that holds atoms & ions together; to become more stable. Ionic bond: transfer an electron from 1 atom to another to create 2 ions; ions of opposite charges are attracted to each other. Chemical reaction: pathway by which 2 substances bond together. Reactants: substances reacting products: substances forming.