| to remove impurities from a gas by chemical means, as sulfur dioxide from smokestack gas or carbon dioxide from exhaled air in life-support packs |
| any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals |
zinc (zĭngk)
n.
Symbol Zn
A metallic element that is brittle at room temperature but becomes malleable when heated. Atomic number 30; atomic weight 65.39; melting point 419.5°C; boiling point 907°C; specific gravity 7.133 (25°C); valence 2.
| zinc (zĭngk) Pronunciation Key
Symbol Zn A shiny, bluish-white metallic element that is brittle at room temperature but is malleable when heated. It is used in alloys such as brass and bronze, as a coating for iron and steel, and in various household objects. Zinc is essential to human and animal growth. Atomic number 30; atomic weight 65.39; melting point 419.4°C; boiling point 907°C; specific gravity 7.133 (25°C); valence 2. See Periodic Table. |