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This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.
Chemical warfare (CW) involves using the toxic properties of chemical substances as weapons.This type of warfare is distinct from nuclear warfare, biological warfare and radiological warfare, which together make up CBRN, the military acronym for chemical, biological, radiological, and nuclear (warfare or weapons), all of which are considered "weapons of mass destruction" (WMDs), a term that ...
Enemmy is a 2013 Indian Hindi-language action thriller film directed by Ashu Trikha - the title being intentionally misspelt using the 6 main characters initials. [1] The film stars Mithun Chakraborty, Sunil Shetty, Mahakshay Chakraborty, Kay Kay Menon, Johnny Lever, Zakir Hussain and Yuvika Chaudhary. and Deepraj Rana
The UN GHS Hazard Class and Division (HC/D) is a numeric designator within a hazard class indicating the character, predominance of associated hazards, and potential for causing personnel casualties and property damage. It is an internationally accepted system that communicates using the minimum amount of markings the primary hazard associated ...
Most homoleptic organo-main group compounds adopt a characteristic oxidation state: RLi, R 2 Be, R 3 B/R 3 Al, R 4 Si, R 3 P, R 2 S. Members where the simplest stoichiometry violates the octet rule often aggregate by formation of bridging alkyl groups. When the alkyl group bridges two main group elements, the bonding is called three-center two ...
Early ICBMs and bombers were relatively inaccurate, which led to the concept of countervalue strikes — attacks directly on the enemy population, which would theoretically lead to a collapse of the enemy's will to fight. During the Cold War, the Soviet Union invested in extensive protected civilian infrastructure, such as large "nuclear-proof ...
The antagonist is commonly positioned against the protagonist and their world order. [4] While narratives often portray the protagonist as a hero and the antagonist as a villain, like Harry Potter and Lord Voldemort in Harry Potter, the antagonist does not always appear as the villain.
The word archenemy originated around the mid-16th century, from the words arch-[3] (from Greek ἄρχω archo meaning 'to lead') and enemy. [1]An archenemy may also be referred to as an archrival, [4] archfoe, [5] archvillain, [6] or archnemesis, [7] but an archenemy may also be distinguished from an archnemesis, with the latter being an enemy whom the hero cannot defeat (or who defeats the ...