Atomic Theory, Properties, & Organization of Periodic Table Study Guide PDF

Name: __________________ Science Block: _____ Atomic Theory, Properties, & Organization of Periodic Table Study Guide 1. Fill in the table about the evolution of the atom: Year Scientist Model Description Picture 440...

Name: __________________ Science Block: _____ Atomic Theory, Properties, & Organization of Periodic Table Study Guide 1. Fill in the table about the evolution of the atom: Year Scientist Model Description Picture 440 Democritus Atomos Everything is made of B.C. “atomos”, that cannot be cut 300 Aristotle Model of All matter is made up of B.C. Continuity four elements: Fire, Earth, Water, and Air 1803 Dalton Cue Ball All matter is made up of atoms. All elements have atoms that cannot be divided. 1897 Thomson Plum Positively charged sphere. Pudding Introduced electrons. 1911 Rutherford Rutherford Introduced nucleus that contains most of an atom's mass. 1913 Bohr Bohr Electrons orbit around the nucleus in energy levels Name: __________________ Science Block: _____ current Group of Electron Electrons travel around in scientists cloud the nucleus in a “cloud”, not in a specific path. History of the atom KEY 2. Label the model of the atom and complete the table. Charge Location Mass Proton +1 Nucleus 1 amu Neutron neutral Nucleus 1 amu Electron -1 Outside of nucleus Almost nothing Name: __________________ Science Block: _____ 3. Find the number of protons, neutrons, and electrons, group, and period of each element, ion, or isotope. Protons Neutrons Electrons Group Period Valence electrons Al 13 14 13 13 3 3 Br 35 45 35 17 4 7 Ar 18 22 18 18 3 8 4. Draw the Bohr models for the following elements: a. Fluorine b. Beryllium 5. Define each property as chemical or physical. a. Acidity: ___chemical_____ e. Volume:___physical_____ b. Odor: ____physical_______ f. Solubility: ___physical____ Name: __________________ Science Block: _____ c. Reactivity:_____chemical___ g. Flammability: __chemical____ d. Combustibility:__chemical__ h. Boiling Point:___physical____ 6. Define the following properties: a. Density: the amount of matter in a given space b. Solubility: the ability to be dissolved c. Conductivity: the ability of a substance to allow heat or electricity to flow through it d. pH: a measure of how acidic or basic a substance is. Acids have extra H+ ions. Bases have extra OH- ions. e. Combustibility: the ability of a substance to ignite or burn in specific conditions f. Reactivity: the ability of a substance to chemically interact with other substances