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Summary Kwartaal 2 Fisies Opsomming Graad 9
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Graad 9 Kwartaal2 Natuurwetenskappe Opsomming, Fisies en Chemies. Grade 9 Term 2 Science summary in Afrikaans.
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NWElemente (1ste 20)
1. H - Waterstof 11. Na - Natrium
2. He - Helium 12. Mg - Magnesium
3. Li - Litium 13. Al - Aluminium
4. Be - Berillium 14. Si - Silikon
5. B - Boor 15. P - Fosfor
6. C - Koolstof 16. S - Swawel
7. N - Stikstof 17. Cl - Chloor
8. O - Suurstof 18. Ar - Argon
9. F - Fluoor 19. K - Kalium
10. Ne - Neon 20. Ca - Kalsium
Massagetal = die onderste getal
3 Atoomgetal
Li Element
7 Massagetal
Diatomiese Elemente:
Hoekom is dit ‘n diatomiese element?
• Want dit bestaan uit 2 atome/molekules
1. H2
2. N2
I = Jodium
3. O2
4. F2
5. Cl2
6. Br2
7. I2
Metale, half-metaal, nie-metaal => moet kan identifiseer
, Verbindings:
• Stowwe wat uit 2 of meer elemente bestaan
• In ‘n vaste verhouding chemise aan mekaar verbind
• Kan in eenvoudiger stowwe afgebreek word
• Maak gebruik van chemiese formules om dit te illustreer Bv. NaCl (Natriumchloried)
• NaCl se verhouding is 1:1 CO2 se verhouding is 1:2
• Party verhoudings kry voorvoegsels by. Dui ook aan hoeveel atome daar is
▪ Mono = 1
▪ Di = 2
▪ Tri = 3
▪ Tetra = 4
• CO = Koolstofmonoksied
• CO2 = Koolstofdioksied
• Kry ook ‘n agtervoegsel (-ied) by laaste element Sleutel:
Swart: Koolstof
• Tipes Modelverbindings:
Blou: suurstof
▪ Balmetode
CO
CO2
▪ Stok en bal metode
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