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• Select Nonmetal

  1

  Nonmetal

  Editors:Katherine H. Nemeh and Jacqueline L. LongeFrom:The Gale Encyclopedia of Science (Vol. 5. 6^th ed.)

  2021311 words Topic overview 1230LA nonmetal is a chemical element that generally does not conduct heat or electricity very well, is usually a solid or a gas at normal temperatures, and (for solids) is difficult to reshape by pounding or beating....
• Select Nonpoint Source

  2

  Nonpoint Source

  Editors:Katherine H. Nemeh and Jacqueline L. LongeFrom:The Gale Encyclopedia of Science (Vol. 5. 6^th ed.)

  2021308 words Topic overview 1360LNonpoint sources refer to numerous, relatively small sources of gases, metals, pesticides, nutrients, or other pollutants into the environment. Collectively, these many sources can represent a substantial contribution of...
• Select Mineralogy

  3

  Mineralogy

  Author:Jennifer McgrathFrom:The Gale Encyclopedia of Science (Vol. 5. 6^th ed.)

  20211,293 words Topic overview 1160LMineralogy is the branch of geology concerned with the study of minerals. A mineral is a naturally occurring, homogeneous solid with a definite chemical composition and a highly ordered atomic structure. A homogeneous...
• Select Periodic Table

  4

  Periodic Table

  Author:Michael G. RoepelFrom:The Gale Encyclopedia of Science (Vol. 6. 6^th ed.)

  20215,298 words Topic overview 1310LThe arrangement of the chemical elements into periods (horizontal rows) and groups (vertical columns) is called the periodic table. The periodic table is an essential part of the language of chemistry. It has much in...