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一个铀核(U)发生裂变,核反应方程是U+n→Ba+K+3X,并出现质量亏损.则( )
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高三下学期物理《》真题及答案
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2015•钦州核电站是利用铀核在选填裂变或聚变时释放的能量来发电在核反应堆中发生的链式反应是选填可控
下列说法中正确的是
核反应方程:
,其中x—定是质子
铀核裂变的核反应是:
原子核经过一次a袞变,中子数减少2个
重核裂变过程会发生质量亏损,轻核聚变过程总质量会增加 E. 某金属在频率为v的单色光束照射下发出光电子,其最火初动能可以等于hv
铀裂变生成钡和氪.已知和中子的质量分别为235.0439u140.9139u91.8973u和1.0
关于铀核的裂变下列说法中正确的是
铀核裂变的产物是多种多样的,但只能裂变成2块。
铀核裂变时,还能同时释放出2~3个中子。
.为了使裂变的链式反应容易发生,最好是用纯铀235。
铀块的体积对于产生链式反应无影响。
一个X.核与一个氚核结合成一个氦核时放出一个粒子Y.由于质量亏损放出的能量为△E.核反应方程是可以通
X.是氢的同位素
可以俘获Y.发生裂变反应
核反应
中亏损的质量为
是原子核的人工转变方程
核电站是利用铀核在选填裂变或聚变时释放的能量来发电在核反应堆中发生的链式反应是选填可控或不可控的.
核反应堆的工作原理是利用中子轰击重核发生的裂变反应在众多的裂变反应中有一种反应方程为其中X.为某种粒
X.为中子,a=2
X.为中子,a=3
X.为质子,a=2
X.为质子,a=3
一静止的铀核发生α衰变转变成钍核Th已知放出的α粒子速度为v0=2.0×106m/s.假设铀核发生衰
下列说法中正确的是
原子核在常温下就能发生轻核的裂变
太阳的能量来自大量的氖核的裂变
核电站内的核反应堆是可控制的铀核裂变
煤、石油、天然气都属于可再生资源
目前核反应产生的核能主要来源于U的裂变则下列说法中正确的是
U原子核中有92个质子、143个核子
U的一种可能的裂变是变成两个中等质量的原子核,核反应方程为
,说明U.是由Ba和Kr组成的
U是天然放射性元素,常温下它的半衰期约为45亿年,升高温度半衰期缩短
若一个铀核在裂变前后的质量亏损为
,则其释放的核能为
铀核裂变的一种方式是该反应的质量亏损是0.2u1u相当于931.5MeV的能量.1核反应方程中的X.
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18分在用铀235作燃料的核反应堆中铀235核吸收一个动能约为0.025的热中子慢中子后可发生裂变反
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铀核裂变的一种方式是X.该反应的质暈亏损是0.2u1u相当于931.5MeK的能量.①核反应方程中的
用α粒子轰击氩40时产生一个中子和一个新的核这个新的核是________核反应方程是________
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