注目の話題: 女性の友達ってどうやって作れば良いですか？; 離婚し30年会ってない父親に会う場合; 独身、恋愛経験なし。これから何を目標に生きたらいいか？

Let's enjoy English!

No.373　13/03/11 00:04
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【How is an atom?】

《Atomic number Z and amount of mass A》

We call the sum of the number of proton and neutron amount of mass A.Therefore when deducting the number of the atomic number from the amount of mass,we can find a number of the neutron.😃

《The symbol of an element 元素記号,the atomic number,and the number of the mass.》

We express chemical elements with alphabets.We write its atomic number with small size on lower left of the chemical element,and its amount of mass with little size on upper left on the element,though we can't do it with a cellphone.📲

When dealing with a chemical reaction,the atomic number is very important.☝　　　　　　　　　　　　　　　　　　However the amount of mass plays very important role in relation to the atomic nucleus,especially concerning a matter which I try to express such as nuclear fission 核分裂,nuclear fusion 核融合,reaction and collapse of the atomic nucleus,radiation,and radioactivity.😃