Atoms, Elements, and the Periodic Table - Learning Services Home

Name Date ClassDirected Reading forContent MasteryOverviewAtoms, Elements, and the Periodic TableDirections: Complete the concept map using the terms in the list below.specific ratios elements mixtures atomsMatteris made ofchangingratiosto form3.thatcombinein1.that are composed of4.thatcombinein2.to formcompoundsMeeting Individual NeedsDirections: Use the information in the concept map to answer the following questions.Copyright © Glencoe/McGraw-Hill, a division of the McGraw-Hill Companies, Inc.5. All elements that make up matter are made up of ____________________.6. All compounds are formed from ____________________.7. Mixtures can be formed from elements in ____________________.8. Compounds contain two or more elements combined in ____________________.Directions: Number the following steps in our understanding of the atom in the order in which they occurred.9. J.J. Thomson discovers the existence of the electron.10. John Dalton comes up with the idea that each type of matter is madeof only one kind of atom.11. Ernest Rutherford suggests that electrons are scattered in the mostlyempty space around an atom’s nucleus.12. Democritus devises the theory that the universe is composed of tinybits of matter he called atoms.Atoms, Elements, and the Periodic Table 15