That explained why stable atoms didn’t just collapse.
这就解释了为什么稳定原子不只是坍缩。
单词 | Stable atom |
释义 |
Stable atom
原声例句
SciShow - Chemistry That explained why stable atoms didn’t just collapse. 这就解释了为什么稳定原子不只是坍缩。 SciShow - Chemistry But we know that stable atoms do exist, so there had to be something missing. 但我们知道稳定的原子确实存在,所以肯定少了点什么。 SciShow 合集 But in real-lifey, science-non-fiction, we haven't managed to make any of these stable, super-heavy atoms yet. 但在现实生活中, 非科幻小说中,我们还没有设法制造出任何这些稳定的超重原子。 Crash Course 天文篇 But then, after 380 millennia, it had cooled enough that electrons could combine with protons and helium nuclei, becoming stable neutral atoms for the very first time. 但是,在38万年之后,它已经足够冷却,电子可以与质子和氦原子核结合,第一次成为稳定的中性原子。 Crash Course 综合篇 Those extra neutrons are necessary for atoms with atomic numbers higher than thirty or so, as you can see in this chart relating the number of neutrons to the number of protons in a stable atom. 对于原子序数高于 30 左右的原子来说,这些额外的中子是必需的,正如您在这张图表中看到的,中子数与稳定原子中质子数的关系。
中文百科
稳定同位素 Stable nuclide(重定向自Stable atom)
稳定同位素(Stable isotope),是指化学元素中,不发生放射性衰变或不易发生放射性衰变的同位素,稳定同位素即使会发生衰变,因半衰期太长而无法测量出。 所有同位素中,只有前66个元素中的146个同位素(最重的为镝164)理论上不会发生放射性衰变(不考虑尚未证实的质子衰变),另外有107个理论上会发生某种放射性衰变(α衰变、β衰变或电子捕获),但尚无法证实其放射性(其中最轻的为氩36)。因此已知的稳定同位素共有253个,分布在80个化学元素中。 在这80种有稳定同位素的元素中,有26个元素只存在一种稳定同位素,因此称为单一同位素元素,其他的元素则有不止一种的稳定同位素,其中锡有10种稳定同位素,是具有最多种稳定同位素的元素。
英语百科
Stable nuclide 稳定同位素(重定向自Stable atom)
![]() ![]() ![]() Stable nuclides are nuclides that are not radioactive and so (unlike radionuclides) do not spontaneously undergo radioactive decay. When such nuclides are referred to in relation to specific elements, they are usually termed stable isotopes. The 80 elements with one or more stable isotopes comprise a total of 254 nuclides that have not been known to decay using current equipment (see list at the end of this article). Of these elements, 26 have only one stable isotope; they are thus termed monoisotopic. The rest have more than one stable isotope. Tin has ten stable isotopes, the largest number known for an element. |
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