VocabularyAtomic Number
Mass Number Neutron Proton Electron Isotope Complete Symbol Metal Nonmetal Semimetal Alkali Metal Alkaline Earth Metal Halogen Noble Gas Simple Average Weighted Average Average Atomic Mass Alpha Radiation Alpha Particle Beta Radiation Beta Particle Gamma Radiation X-Radiation Nuclear Fission Nuclear Fusion Half-Life |
Definitionnumber of protons and electrons in the nucleus; number on top of an element symbol
number of protons and neutrons together no charge; bottom left number of an element symbol positive charge; upper left number of an element symbol; same number as electron negative charge; same number as proton same element but has different numbers of neutrons the symbol of the element; includes mass number and atomic number good conductors; high luster(shiny); malleable(breakable) mostly gases; brittle; poor conductors similar to metals and nonmetals Group 1A Group 2A Group 7A Group 8A or 0 assumes the same number for each object; the mean of an object doesn’t have equal number of all the objects; multiply the atomic mass of each isotope, then add the results multiply the mass with the percent abundance consists of a helium nuclei thats been emitted written as α or 4/2 He; has two protons and neutrons; also has a plus two charge; can be stopped by paper and thin objects written as β; consists of fast moving electrons that are made by the decomposition of neutrons lighter than alpha particles; has both positive and negative charge; can be stopped by aluminum foil and pieces of wood written as γ; electromagnetic radiation; low energy light rays; gamma rays; has no mass and electrical charge x-rays; electrons in certain metals lose energy splits and separates; uses little energy to separate combines and fuse; releases more energy than fission; occurs in the Sun time for half of the atoms to produce radiation and decay to products |
Main Source of Information
Cool, Stacey. "Unit 2 Atomic and Molecular Structure." Cool's Chemistry. Merced: S. Cool, 2013. 1-16. Print.