(09年大连24中质检)(选修3―5)(5分)判断以下说法正误,请在

09年大连24中质检)(选修35)(5分)判断以下说法正误,请在相应的括号内打“×”或“√”

A.贝克勒尔通过对天然放射现象的研究发现了原子的核式结构

BN+He O+X  该核反应方程中的X代表质子

C.被中子轰击后铀核分裂成两个中等质量的核,释放出核能的反应,称为裂变;两个轻核结合成质量较大的核,释放出核能的反应,称为聚变。

D.核子结合成核一定吸收能量,核分解成核子一定放出能量。

E.根据玻尔理论,某原子的电子从能量为E的轨道跃迁到能量为E′的轨道,辐射出一定波长的光子,以h表示普朗克常量,c表示真空中的光速,则此光子的波长为

答案

    答案A(×)B(√)C(√)D(×)E(√)……每空1

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