注目の話題: 海外の人に原爆について教える。; どっちの妻がいい？; 独身、恋愛経験なし。これから何を目標に生きたらいいか？

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No.394　13/04/06 13:56
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【What is a radioactive isotope?】

《Atoms and chemical elements》

In a word,the atom is a material,and each particle.On the other hand,the chemical element is a generic name 総称 of which atomic number is same.It includes various isotopes.😃

The atom and chemical element resembles a relation between a common noun and proper one　固有名詞.😃

【What kinds of atoms are there?】

If trying to know how many kinds of atoms there are in the natural world,we have to learn all kinds of isotopes.💧

Even a simple chemical element like hydrogen has three isotopes.Some chemical elements have more than 10isotopeses,so we can't say its kinds' numbers easily.💦

《Chemical elements in the natural world》

Contrary to it,we can say the numbers of kinds of the chemical elements with ease.👍

Roughly speaking,it's said that stable chemical elements on the earth is hydrogen of which atomic number 1 to uranium of which atomic number is 92.😃