CHEM 110 Lecture Notes - Thermodynamics, Nuclear Reaction, Preferred Number
Document Summary
Atoms: atoms are the basic building blocks, composition of atoms, structure of atoms. Fel= k q1q2 r 2: atoms have the same number of protons and electrons=neutral, amu(atomic mass unit or u)= 1. 66054x 10 24 g, the same atoms with a different umber of neutrons are called isotopes. 1g=6. 02214x 10 24 amu: a mole: a collection or sample containing avogadro"s number of objects, atoms, electrons, molecules, or anything else. Section 1. 3 ions and molecules: the formation of ions or assemblies of atoms is the result of changes in electron arrangements, the nuclei is unchanged in these situations, however, in a nuclear reaction the nucleus is changed. Ions are formed when an atom gains or loses an electron: negative ions are anions, positive ions are cations, polyatomic ions- composed of multiple atoms, ex. Nh 4: total number of electrons and protons don"t have to match, atoms can combine with each other without forming ions, ex.
