Page 45 - Hybrid PBD 2022 Tg 4 - Kimia

Kimia Tingkatan 4 Bab 2

(b) Model Atom Thomson

• Menemui zarah bercas negatif iaitu elektron . Elektron
Electron
Discovered negatively charged particles which are electrons .
• Atom berbentuk sfera yang bercas positif dengan
terdapat beberapa elektron di dalamnya.
An atom is a positively charged sphere with a few electrons
Penerbitan Pelangi Sdn Bhd. All Rights Reserved
J.J. Thomson in it.
Sfera bercas positif
1856 –1940 Positively-charged sphere

(c) Model Atom Rutherford

Nukleus yang
• Menemui nukleus . mengandungi proton
Discovered nucleus . Nucleus containing
protons
• Nukleus mengandungi zarah bercas positif
yang dinamakan proton .
Nucleus contains positively charged particles called
Ernest Rutherford protons .
1871 – 1937 • Jisim atom tertumpu di nukleus.
Atomic mass is concentrated in the nucleus. Elektron mengelilingi
• Elektron ialah zarah yang bergerak di luar nukleus. nukleus
Electrons are particles that move outside the nucleus. Electrons surrounding
the nucleus

(d) Model Atom Bohr

• Menemui petala . Elektron
Electron
Discovered shells .
• Elektron bergerak di dalam petala mengelilingi
nukleus . Petala
Shell
Electrons move in the shell around the nucleus .
Nukleus yang
Neils Bohr mengandungi proton
1885 –1962 Nucleus consists of protons

23 © Penerbitan Pelangi Sdn. Bhd.

02 Bab 2.indd 23 10/29/21 5:13 PM