Like her mother, Irene was awarded a Nobel Prize, along with her husband Frederic in 1935, for producing new radioactive elements.

和她的母亲一样，艾琳于1935年，与他的丈夫弗里德里克，因创造了新的放射性元素，共同获得了诺贝尔奖。

As a radioactive element decays, the individuals atoms split into multiple, but when that happens the reaction also releases energy.

当放射性元素衰变时， 单个原子分裂成多个原子，但当这种情况发生时， 反应过程中也会释放能量。

And he was poisoned by radioactive polonium. He died the slow agonizing death in 2006.

他被放射性元素钋毒杀。在2006年缓苦地死去。

British officials said they added radioactive polonium to his tea.

英国官员称他二人在利特维年科茶中放入了放射性元素钋。

When Tepco called for public comments for the study, some experts pointed out troubling information gaps, such as the lack of a full inventory of what radioactive elements remained in the tanks.

当Tepco征求对这项研究的公众意见时，一些专家指出了人担忧的信息缺口，比如没有完整清单列出罐中剩余的放射性元素。

Titanic amounts of heat left over from its birth and the radioactive decay of trillions of tons of radioactive elements find no escape but up.

海量的地球诞生余热及数万亿吨的放射性元素除了向没有其他的逃脱方向。

Dr Alexander Farnsworth, at the University of Bristol, said plutonium is a radioactive element and decays over time, so might not persist over geological timescales of millions.

布里斯托尔大学的亚历山大·法恩斯沃思博士说，钚是一种放射性元素，会随着时间的推移而衰变，因此可能不会在数百万年的地质时间尺度持续存在。

It was being warmed by radioactive elements in the granite that formed in the solidified magma chamber below.

在下面凝固的岩浆腔中形成的花岗岩中的放射性元素正在给它加热。

She added that she wasn't told about the danger of radiation, stating, " About radiation, that radioactivity was escaping, there was not a word" .

她补充道，她没有得到通知有核辐射的危险，她说，" 核放射性元素正在蔓延，但没有人提到一个字。"

Since Mars doesn't have easily accessible radioactive elements, the nuclear fuel needs to come from Earth along with the reactor.

由于火星没有易获得的放射性元素，核燃料和反应堆均需要来自地球。

Let’s start off with another scientist who worked with radioactive elements -- Lise Meitner.

让我们从另一位研究放射性元素的科学家开始——Lise Meitner。

Bismuth is interesting because it is the heaviest element that is not radioactive.

铋很有趣，因为它是最重的非放射性元素。

This could be caused by the decay of radioactive elements in the Moon's core.

这可能是由月球核心中放射性元素的衰变引起的。

Neutrinos are subatomic particles produced when radioactive elements decay.

中微子是放射性元素衰变时产生的亚原子粒子。

Nuclear power plants use a radioactive element as fuel.

核电站使用放射性元素作为燃料。

Compared to its more abundant cousin, a strike by a neutron easily splits the U-235 nuclei into lighter radioactive elements called fission products, in addition to two to three neutrons, gamma rays, and a few neutrinos.

与更为常见的同位素相比，中子撞击U-235原子核时，会轻易将其分裂成较轻的放射性元素，这些元素被称为裂变产物，同时还会释放出两到三个中子、伽马射线及少量中微子。

Well it's fairly simple, given enough time all radioactive elements would decay in to non radioactive forms. Even ultra stable bismuth, with it's half life longer than the age of the universe.

好吧，这相当简单，给足够的时间， 所有放射性元素都会衰变成非放射性形式。 即使是超稳定的铋， 其半衰期也比宇宙的年龄还要长。

Now you might be asking, if radioactive elements are always decaying in to more and more stable isotopes that are eventually no longer radioactive, why are they still around at all?

现在你可能会问，既然放射性元素一直在衰变成越来越稳定的同位素，最终不再具有放射性，那它们为什么还能存在至今呢？

One of those materials was plutonium which is a highly radioactive element that was seen as  the highest concern for nuclear proliferation.

其中一种材料是钚，它是一种高放射性元素，被视为核扩散最人担忧的元素。

The combination of kinetic energy and heat from decaying radioactive elements heated the core of the growing planet into molten iron.

放射性元素衰变所产生的动能和热量，使这颗逐渐形成的行星的内核熔化成了铁水。