Diatomic molecules are molecules composed only of two atom s, of either the same or different chemical element s. The prefix di-means two in Greek. Common diatomic molecules are hydrogen (H 2), nitrogen (N 2), oxygen (O 2), and carbon monoxide (CO).he bond in a homonuclear diatomic molecule is non-polar and covalent. In most diatomic molecules, the elements are nonidentical. Prominent examples include carbon monoxide, nitric oxide, and hydrogen chloride, but other important examples include MgO and NaCl.
Africa, which developed the world's oldest human civilization, gave humanity the use of fire a million and half to two million years ago. It is the home of the first tools, astronomy, jewelry, fishing, mathematics, crops, art, use of pigments, cutting and other pointed instruments and animal domestication.In short Africa gave the world human civilization.illions of years ago human life started in Africa, Australopithecus aphaeresis and Australopithecus africanus and Australopithecus robustus were all key rungs in the development of humanity.
Towards the end of the Neolithic period, various Chalcolithic civilizations began to rise in various cradles from around 3300 BCE. Chalcolithic Civilizations, as defined above, also developed in Pre-Columbian Americas and, despite an early start in Egypt, Axum and Kush, much later in Iron Age sub-Saharan Africa.he English word civilization comes from the 16th-century French civilise (civilisÃ©), civilized From latin (civilis), civil related to (civis) citizen and (civitas). City the fundamental treatise Is Norbert 'elias S The Civilizing (process), 1939 which traces social mores from medieval courtly society to The Early modern. period