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电子 是a 亚原子粒子 那运载阴性 电荷. 它有 没有已知的亚结构 并且应该是a 点微粒. 电子有a 大量 那近似地是 1/1836 那 氢核. 内在 角动量 (旋转)电子是一个半整数值 ¹⁄₂，因此它意味着它是a 费米子. 电子，属于一个 世代 雷普顿 微粒家庭，参与 重心, 电磁式 并且 微弱 互作用. 电子有 量子机械 微粒和a物产 波浪，因此他们可以与其他微粒碰撞和是 衍射 象光。 因为电子是费米子，二个电子不可能占领同一量子态，物产以著名 Pauli不相容原理. 1897年电子被辨认了作为一个微粒 J. J. Thomson 并且他的英国的物理学家的队。 在许多物理现象，例如 电, 磁性和 导热性电子扮演一个根本角色。 电子引起a 磁场 当移动和它由外在磁场时偏转。 交换或分享电子在两个或多个原子之间是主要起因 化工接合. 电子也许通过歼灭被毁坏与正子或者也许被吸收在期间 nucleosynthesis在星. 电子有许多应用，包括 焊接, 阴极射线管, 电子显微镜, 放射治疗, lasers 并且 粒子加速器. (更多…)

最近以为特色： 汉朝 – 死亡谷国家公园 – 风

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• Continued flooding affecting Great Britain and Ireland results in two deaths.
• Prime Minister of Belgium Herman Van Rompuy (pictured) is chosen as the first permanent President of the European Council.
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November 21: World Hello Day; World Television Day; Armed Forces Day in Bangladesh

• 1783 – The first successful untethered flight by humans in a hot air balloon was made by Jean-François Pilâtre de Rozier and François Laurent d'Arlandes in Paris.
• 1920 – Irish War of Independence: On Bloody Sunday in Dublin, the Irish Republican Army killed more than a dozen British intelligence officers known as the Cairo Gang, and the Auxiliaries of the Royal Irish Constabulary opened fire on players and spectators at a Gaelic football match in Croke Park.
• 1964 – The Verrazano-Narrows Bridge (pictured), a suspension bridge connecting Staten Island and Brooklyn in New York City at the Narrows, opened to traffic, becoming the largest suspension bridge in the world at the time.
• 1974 – Explosives placed in two central pubs in Birmingham, England, killed 21 people and injured 182 others, and eventually led to the arrest and imprisonment of six people who became known as the Birmingham Six.
• 1977 – "God Defend New Zealand" became New Zealand's second national anthem, on equal standing with "God Save the Queen", which had been the traditional one since 1840.

More anniversaries: November 20 – November 21 – November 22