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Summary - Physical Sciences Grade 9 PART ONE R111,33
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Summary - Physical Sciences Grade 9 PART ONE

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Notes about physical sciences for grade 9. Please look for part 2. This is only part one

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  • June 8, 2024
  • 13
  • 2023/2024
  • Summary
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 Alle elemente is elemente of is op gebou uit elemente.
 Elemente kan nie deur chemiese metodes opgebreuk word nie.
 Atome van verskillende elemente verbind in vaste verhoudings met mekaar om verbindings
te vorm.
 N verbinding kan opgebreuk word in elemente deur reaksies soos elektroliese.




n Element is n suiwer stof n Verbinding is n suiwer
wat net uit een sort atoom stof en bestaan uit twee of
bestaan meer verskillende atome.




 Atome van n element bestaan uit drie subatomiese deeltjies:
protone (+), neutrone(=), elektrone(-).

 Kern is in die middle en bevat protone en neutrone
( nukleone).


 Protone → positiewe lading.


 Neutrone →neutrale lading of geen.


 Elektrone→negatiewe lading.


 Oor die algemeen is atome neutraal.


1

, Die Periodieke Tabel

75% is metale.


Horisontale rye → periodes


Vertikale rye→ groepe


Groepe word so genoem:
 Groep 1: alkalimetale
 Groep2: alkali-aardmetale
 Groep 3-12: oorgangsmetale
 Groep 13-16: semi-metale
 Groep 17: halogene
 Groep 18: edelgasse


Elemente in = groepe het = chemiese eienskappe.


Elemente 58-71 → Lantaanreeks (lantaniede)


Elemente 90-103→ Aktiniumreeks (aktiniede)


2

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