teach about element
Today , we will talk about element.Then first, I introduce Hydrogen.
Hydrogen,which is Atomic mass: 1,Protein: 1 element:1 and neutrons electrons are 2
Next, i will talk about carbon.Carbon atomic mass is 6 ,protein is 6, element is also 6.Otherwise,neutrons electrons are12.
Let"s stop now.We will have 5 minutes break.
OK,Let start now.After, we will talk about Calcium.Calcium atomic mass is 20.Protein is 20 also element is 20 and the neutrons electrons are 40.
OK, the lesson will stop here today, Please write down homework into your handbook.
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