Atomic Theory and Structure Atomic Theory II: Ions, neutrons, isotopes and quantum theory by Adrian Dingle, B.Sc., Anthony Carpi, Ph.D. Reading Quiz Teach with this 1. Ions are: neutrons protons electrons charged atoms 2. Isotopes are atoms of the same element with: different atomic numbers different numbers of neutrons different numbers of protons different numbers of electrons 3. The atomic number is the same in different isotopes of the same element: true false 4. Which part of Dalton's original atomic theory must be modified with the discovery of isotopes? Compounds are formed when elements enter into chemical reactions Atoms combine with other atoms in whole number ratios to form compounds Matter is composed of atoms All atoms of a given element are identical 5. Who was the person to propose the theory of atomic structure based on line spectra? Ernest Rutherford John Dalton Niels Bohr James Chadwick 6. The distinct pattern of colors emitted by excited atoms is called: a rainbow continuous spectra cathode rays line spectra 7. Under Bohr's theory of line spectra, the energy in atoms is: quantized continuous zero infinite 8. When an electron is excited, the electron's "distance" from the nucleus: cannot be predicted decreases increases stays the same 9. In the normal or "ground" state, all of the electrons in an atom are: not moving in the nucleus in the lowest possible electron shells in the highest possible energy shells 10. The maximum number of electrons that may reside in the first energy level is: eight three two thirteen 11. How many electron volts are required to make hydrogen's electron "jump" from energy level 1 to level 3? 0.7 eV 12.1 eV 10.2 eV 1.9 eV 12. The existence of line spectra can be explained by: electrons "jumping" and "falling" to and from specific orbitals the unique colors of atoms the unique properties of neon lights atoms crashing into prisms Score Quiz
