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.
Cradle of Civilization. The southern part of the modern country of Iraq is called the Cradle of Civilization.. The worlds first cities, writing systems, and large-scale government developed there. Civilization is a complex way of life that came about as people began to develop urban settlements. The earliest civilizations developed after 3000 BCE, when the rise of agriculture allowed people to have surplus food and economic stability. Agricultural populations advanced beyond village life, and many people no longer had to practice farming at all. Civilizations first appeared in Mesopotamia, in what is now Iraq