Chapter 2 Key Terms

• p. 24: matter, atoms, electrons, nucleus (plural, nuclei), protons, neutrons, atomic number, mass
  
• p. 25: atomic mass, daltons, element, isotopes, radioactive decay, radioactive, half-life
  
• p. 26: neutral atom, ions, cation, anion, orbital
  
• p. 27: potential energy, oxidation, reduction, energy level
  
• p. 29: valence electrons, inert, periodic table, octet rule, rule of eight, molecule, compound, chemical bonds, ionic bond, ionic compound
  
• p. 30: covalent bonds, double bonds, single bonds, structural formulas
  
• p. 31: molecular formulas, chemical reaction, reactants, products, equilibrium (plural, equilibria)
  
• p. 33: water
  
• p. 34: electronegativity, tetrahedron, polar molecules, hydrogen bonds
  
• p. 35: cohesion, adhesion, surface tension, electrostatic attraction, capillary action
  
• p. 36: specific heat, heat of vaporization, soluble, hydration shell, hydrophobic, hydrophilic, hydrophobic exclusion
  
• p. 37: hydronium ion, hydroxide ion, ionization, mole, molar concentration, pH scale, acid, base
  
• p. 39: buffers