注目の話題: 不倫して心入れ替えたパートナーっています？; 🔥理沙の夫婦生活奮闘日記😤パート3️⃣💥; バージンロードを1人で歩いてはいけないのでしょうか。

Let's enjoy English!

No.385　13/03/31 01:07
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【What is a radioactive isotope?】

《When its amount of mass is big,it's unstable》

A typical ones are atoms of which atomic numbers are more than 92.In general,we call them super uranium chemical elements.😃

They are so big that when being emitted,they split into small and stable atoms,so they don't exist in the natural world.😚

We humankind has created them intentionally with an atomic reactor.They are artificial chemical elements.They don't exist for a long period.The shortest one breaks in no more than one thousandth second.😲

《Atoms and chemical elements》

We have been able to recognize while we call the atoms the same name,the atoms of which amount are different.😃

Therefore we can make the difference between them clear.When reading a book on the atom,some people may have been confused the distinction between them.😥

Without any knowledge on the atom,it's apt to be so idealistic that we find it hard to understand.😔