Nuclear weapon - Wikipedia
网页A nuclear weapon [a] is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion.
Nuclear weapon | History, Facts, Types, Countries, Blast Radius ...
网页3 天之前 · A nuclear weapon is a device designed to release energy in an explosive manner as a result of nuclear fission, nuclear fusion, or a combination of the two. Fission weapons are commonly referred to as atomic bombs, and fusion weapons are referred to as thermonuclear bombs or, more commonly, hydrogen bombs.
Atomic Bomb: Nuclear Bomb, Hiroshima & Nagasaki ‑ HISTORY
网页2017年9月6日 · The atomic bomb and nuclear bombs are powerful weapons that use nuclear reactions as their source of explosive energy. Scientists first developed nuclear weapons technology during...
Atomic bomb | History, Properties, Proliferation, & Facts
网页2024年8月25日 · atomic bomb, weapon with great explosive power that results from the sudden release of energy upon the splitting, or fission, of the nuclei of a heavy element such as plutonium or uranium.
Nuclear Weapons - Our World in Data
网页Nine countries currently have nuclear weapons: Russia, the United States, China, France, the United Kingdom, Pakistan, India, Israel, and North Korea. These nuclear powers differ a lot in how many nuclear warheads they have. The chart shows that while most have dozens or a few hundred warheads, Russia and the United States have thousands of them.
How Many Nuclear Weapons Exist, and Who Has Them?
网页2022年3月22日 · Nuclear weapons analysts estimate that the world’s nine nuclear states—China, France, India, Israel, North Korea, Pakistan, Russia, the United Kingdom and the United States—have around ...
How the advent of nuclear weapons changed the course of history
网页2020年7月15日 · In the 75 years since the first successful test of a plutonium bomb, nuclear weapons have changed the face of warfare. Here, troops in the 11th Airborne division watch an atomic explosion...
Manhattan Project | Definition, Scientists, Timeline, Locations, …
网页2024年9月7日 · Discover more about the first atomic bombs The first atomic bomb was detonated on July 16, 1945, in New Mexico as part of the U.S. government program called the Manhattan Project. The United States then used atomic bombs on Hiroshima and Nagasaki in Japan on August 6 and 9, respectively, killing about 210,000 people.
Nuclear weapons: Which countries have them and how many are there? - BBC
网页2020年1月14日 · The number of nuclear weapons in the world is actually down from 70,000 in 1986 to around 14,000 today. The US, UK and Russia have all been reducing their stockpiles, but China, Pakistan, India...
Bombing of Hiroshima and Nagasaki - HISTORY
网页2009年11月18日 · On August 6, 1945, during World War II (1939‑45), an American B‑29 bomber dropped the world’s first deployed atomic bomb over the Japanese city of Hiroshima, immediately killing 80,000 ...