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Summary Opsomming Ken & Verstaan Natuurwetenskappe Leerdersboek Kwartaal 2 Eksamen Vraestel

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Kwartaal 2 Naruurwetenskappe Eksamen Vraestel Fisies en Chemies Ken & Verstaan Leerdersboek Eenheid 1 - 4 Opsomming Summary NS Term 2 in Afrikaans

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Document information

Summarized whole book?
No
Which chapters are summarized?
Kwartaal 2 eenheid 1 - 4
Uploaded on
August 22, 2023
Number of pages
8
Written in
2023/2024
Type
Summary

Subjects

Content preview

NW
Elemente (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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