
Teori Perkembangan Atom
Presentation
•
Chemistry
•
10th Grade
•
Hard
Riska Nurhidayati
FREE Resource
6 Slides • 0 Questions
1
by Riska Nurhidayati
Teori Perkembangan Atom
2
Democritus, seorang ahli filsafat Yunani menyebut materi yang tidak dapat dibagi lagi disebut atomos (a = tidak ; tomos = terbagi)
TEORI PERKEMBANGAN ATOM
bermula dari
3
üAtom sebagai partikel terkecil .
üAtom berbentuk bola pejal (tidak dapat diciptakan, dimusnahkan, maupun dibelah).
üUnsur yang sama mengandung atom-atom yang sama.
üAtom-atom bergabung membentuk senyawa dengan perbandingan bulat dan sederhana.
Kelemahan :
Tidak dapat menjelaskan, “Mengapa larutan bisa menghantarkan listrik?”
ilustrasi atom dalton
TEORI ATOM DALTON
4
Eksperimen
"Tabung Sinar Katode"
Sinar katode bermuatan negatif disebut “Elektron"
Atom terdiri atas materi bermuatan positif yang elektron tersebar di dalamnya sering diistilahkan "roti kismis"
TEORI ATOM THOMSON
5
•Pembuktian Rutherford menggunakan Eksperimen “Lempeng Tipis Emas” menggunakan sinar α
Ditemukan pembelokan sinar disebut partikel bermuatan positif “proton”
Atom bersifat netral
∑proton = ∑elektron
Atom terdiri dari inti atom yang bermuatan positif dan elektron-elektron bermuatan negatif yang beredar mengelilingi inti.
TEORI ATOM RUTHERFORD
6
by Riska Nurhidayati
Teori Perkembangan Atom
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