Answer
a. Na: Sodium; Cl: Chlorine;
b. Ca: Calcium; S: Sulfur; O: Oxygen;
c. C: Carbon; H: Hydrogen; Cl: Chlorine; N: Nitrogen; O: Oxygen;
d. Li: Lithium; C: Carbon; Oxygen.
Work Step by Step
Consult Table 4.2 (Page 103) to see the names of some common elements and their symbols.