试题与答案

俄罗斯科学家用一种钙原子轰击含95个质子的镅原子,成功合成4个第115号元素的原

题型:选择题

题目:

俄罗斯科学家用一种钙原子轰击含95个质子的镅原子,成功合成4个第115号元素的原子,这4个原子生成数微秒后衰变成第113号元素。下列有关叙述正确的是(  )。

A.115号元素在第六周期

B.113号元素在第七周期ⅢA族

C.115号和113号元素都是非金属元素

D.镅元素和115号元素不在同一周期

答案:

答案:B

95号元素镅、115号元素、113号元素,原子序数都大于86而小于118,所以都在第七周期;115号比118号原子序数少3,应在第ⅤA族,113号元素在第ⅢA族;113号元素和115号元素都是金属元素。

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