Introduction to atoms and molecules. Chapter 2-1 – 2-5 Chapter 5-7 and 5-9 Chapter 4-5 – 4-6. Key concepts in this unit. Dalton’s atomic theory The electron, proton, and neutron Isotope, atomic number, mass number Molecules and molecular formulas Introduction to ions
Chapter 2-1 – 2-5
Chapter 5-7 and 5-9
Chapter 4-5 – 4-6
1 amu = 1.66053873 10-24 g
Table 2-3 (p. 55) and Table 4-11 (p. 142) contain the names and symbols of common cations that you should know.
The common anion is named using the suffix –ate.
Note that the CHARGES on a “family” of oxyanions doesn’t change when the
number of oxygens varies. The oxidation number of the central atom does change.
We’ll discuss this later.
(Sometimes the addition of a hydrogen is indicated by the prefix bi-. For instance, HCO3- is the bicarbonate anion, as in NaHCO3, sodium bicarbonate. Use of either bi or hydrogen is correct).
Table 2-3 (p. 55) and Table 4-11 (p. 142) contain the names and symbols of common anions that you should know. You should also be able to properly name the relatives of the “common” oxyanions.
Double check: the formula for any ionic compound must = ZERO.