Unit 1 Sec. A Summary HW 3

6/18/14

12) a. Phosphoric acid, H₃PO₄ (used in soft drinks and fertilizers)

            elements: 3 hydrogen, 1 phosphorus, and 4 oxygen

b. Sodium hydroxide, NaOH (found in some drain cleaners)

      elements: 1 sodium, 1 oxygen, and 1 hydrogen

c. Sulfur dioxide, SO₂ (a by-product of coal combustion)

      elements: 1 sulfur and 2 oxygen

13) a. Shiny in appearance metal

b. Does not react with acids nonmetals

c. Shatters easily nonmetals

d. Electrically conductive metals

14) Silicon (Si) and germanium (Ge) are metalloids.

15) The nickel would probably dent or flatten if it is tapped with a hammer.

16) Nonmetals do not conduct electricity and are brittle making it unsuitable for electric wiring.

17) Metals are malleable, ductile, and luster making it suitable for coins.