chapter 2(a) atoms, molecules, and ions. copyright © houghton mifflin company. all rights...
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Chapter 2(a)
Atoms, Atoms, Molecules, Molecules,
and Ionsand Ions
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Copyright © Houghton Mifflin Company. All rights reserved. 2b–2
Figure 2.4: A representation of some of Gay-Lussac's experimental results on
combining gas volumes.
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Figure 2.5: A representation of combining gases at the molecular level. The spheres
represent atoms in the molecules.
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Figure 2.7: A cathode-ray tube. The fast-moving electrons excite the gas in the tube,
causing a glow between the electrodes.
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Figure 2.8: Deflection of cathode rays by an applied electric field.
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Figure 2.9: The plum pudding model of the atom.
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Figure 2.10: A schematic representation of the apparatus Millikan used to determine the
charge on the electron.
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Figure 2.12: Rutherford's experiment on -particle bombardment of metal foil.
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Figure 2.13: (a) The expected results of the metal foil experiment if Thomson's model
were correct. (b)Actual results.
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Figure 2.14: A nuclear atom viewed in cross section. Note that this drawing is not to scale.
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Figure 2.15: Two isotopes of sodium. Both have eleven protons and eleven electrons, but they differ in the number of neutrons in
their nuclei.
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Figure 2.16: The structural formula for methane.
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Figure 2.17: Space-filling model of methane. This type of model shows both the relative sizes of the
atoms in the molecule and their spatial relationships.
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Figure 2.18: Ball-and-stick model of methane.
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Figure 2.19: Sodium metal reacts with chlorine gas to form solid sodium chloride.
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Chapter 2(b)
Atoms, Atoms, Molecules, Molecules,
and Ions and Ions (cont’d)(cont’d)
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Figure 2.20: Ball-and-stick models of the ammonium ion and the nitrate ion.
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Figure 2.21: The Periodic Table.
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Crystals of copper(II) sulfate.
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Various chromium compounds dissolved in water. From left to right; CrCl2, K2Cr2O7, Cr(NO3)3, CrCl3,
K2CrO4.
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Figure 2.22: The common cations and anions
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Figure 2.23: A flowchart for naming binary compounds.
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Figure 2.24: Overall strategy for naming chemical compounds.
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Figure 2.25: A flowchart for naming acids. An acid is best considered as one or more
H+ ions attached to an anion.