مدرس اون لايندخول

اقوى مذكرة كيمياء انجلش للصف الثانى الثانوى لغات بتعديل 2013

Chapter one
Structure of the atom
Atomic structure
1- Greek philosophers:
Any piece of matter can be divided into smaller parts and each part can be subdivided into smaller parts which can't be divided this part is called Atom.
2- Aristotle
a-He refused the idea of Greek philosophers about the atom .
b- He supposed that all matters composed of 4 constituents which are ( water, air , dusta and fire and postulated that the cheap metals such as iron or copper can be changed into precious ones like gold by changing the percentage of four constituents.
3- Boyl ( lrish 1661 )
i-He refused the Aristotle concept.
ii-He was the 1st scientist to define the element as pure simple substance which can
not be analvsed into smple one by normal chemical methods.
4) Dulton s atom ( Englsh 1803 )
He supposed thet :
1- The substance consists of very amall particles called atoms.
2- Every element consists of very small dense atoms which can t be divided.
3- Atoms f the same element are identical.
4- Atome of different are different.
N.B By the 19 th century
Scientists had accepted the idea that elements consists of atoms but they knew very little about those atoms
اقوى مذكرة كيمياء انجلش للصف الثانى الثانوى لغات بتعديل 2013 3646708470

الباسورد
www.modars1.com


remove_circleمواضيع مماثلة
Mr.Riad
avatar
avatar
مريم
avatar
avatar
avatar
avatar
جزاك الله خيراااااااااااااا
avatar
شكرا اوى
avatar
,hhhhhhhhhhhhhhhhhhhh
avatar
avatar
رائععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععععع Laughing Laughing Laughing Laughing Laughing Laughing
medhatsabry
avatar
شكرررررررررررررررررررا جزيلا
avatar
avatar
thx
avatar
avatar
avatar
شكرا
sassosasso
avatar
avatar
Evil or Very Mad that thing is not working at all
صقر1
avatar
avatar
thanks very much
avatar
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
avatar
dsadsadsadsadsada
avatar
avatar
avatar
avatar
شكرااااااااااااااااااااا
Professor
avatar
avatar
:شكر: thanks
avatar
avatar
avatar
شكرا جزيلا
Professor
avatar
Thanks
avatar
شكرررررررررررررررررررا جزيلا
avatar
مشكور جدا جدا وما قصرت
avatar
Smile Very Happy
avatar
يارب في النهاية لا تكون هجس
avatar
العلم والايمان
شكرا للرد بالتوفيق
avatar
شكرااااااااااااااااااااااااااااااااااا
avatar
شكراااااااااااااااا
العلم والايمان
شكرا للرد موفقين جميعا
avatar
privacy_tip صلاحيات هذا المنتدى:
لاتستطيع الرد على المواضيع في هذا المنتدى