N combines,, with,, some.
C combines,, with,, many.
Two elements form a substance.
Three elements form vegetable life.
Four elements form animal life.
Common salt is used daily with our food; is harmless and useful; it is known as the chloride of sodium. By analysis this compound is separated, analyzed, into chlorine and sodium. Na stands for sodium, and Cl for chlorine. Combine Cl with H. That forms hydrochloric acid, a strong poison, strong enough to dissolve marble. Cl has little attraction for O. Its chemical energies are principally exerted toward hydrogen and the metals. Cl is one of the best disinfectants, and makes excellent bleaching material. Na (sodium) combines with O, and H, and C. These are some of the combinations:
Na Cl = common salt.
Cl H = hydrochloric acid, a poison.
O Na H = caustic soda.
Na2 N O3 = Chili saltpetre.