3 Technetium(Tc) is a second row transition element that does not occur naturally on Earth. One of its isotopes has 56 neutrons.What is the nucleon number of this isotope? C A 43 B 56 C 99 D 112 相关知识点: 试题来源: 解析 C ...
So … the masurium people were obviously wrong and the technetium people were right … right?Well, that was then.Now we know that element 43 does occur naturally — it can be naturally generated from uranium atoms that have spontaneously split. And guess what... the ore sample the masurium...
Now we know that element 43 does occur naturally —it can be naturally generated from uranium atoms that have spontaneously split.And guess what... the ore sample the masurium group was working with had plenty of uranium in it — enough to split into measurable amounts of masurium.So Tacke...
Now we know that element 43 does occur naturally —it can be naturally generated from uranium atoms that have spontaneously split.And guess what... the ore sample the masurium group was working with had plenty of uranium in it — enough to split into measurable amounts of masurium.So Tacke...
Now we know that element 43 does occur naturally —it can be naturally generated from uranium atoms that have spontaneously split.And guess what... the ore sample the masurium group was working with had plenty of uranium in it — enough to split into measurable amounts of masurium.So Tacke...
So … the masurium people were obviously wrong and the technetium people were right … right?Well, that was then.Now we know that element 43 does occur naturally — it can be naturally generated from uranium atoms that have spontaneously split. And guess what... the ore sample the masurium...