Matter, Chemical Trends, and Chemical Bonding

B3.1 explain the relationship between the atomic number and the mass number of an element, and the difference between isotopes and radioisotopes of an element. ▹
B3.2 explain the relationship between isotopic abundance of an element’s isotopes and the relative atomic mass of the element. ▹
B3.3 state the periodic law, and explain how patterns in the electron arrangement and forces in atoms result in periodic trends (e.g., in atomic radius, ionization energy, electron affinity, electronegativity) in the periodic table. ▹
B3.4 explain the differences between the formation of ionic bonds and the formation of covalent bonds. ▹