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1. What does this symbol mean? 2. Sodium has this hazard symbol - what precautions should you take when using it?
3. What does this mean?
4. What element does this represent? Na 5. Which group is it in? 6. Which period is it in?
7. What is the name of the group which this element belong to? Cl 8. What does Cl 2 tell you? 9. Why am I added to water at the swimming pool?
10. What do these alkali metals have in common? Li Na K Rb Cs 11. Do they become more or less reactive as you go down the group? 12. Name the two products: Sodium + water
13. Name the 3 particles inside an atom and give their charges.
14. What word do we use to describe a charged particle?
15. Element or compound?
16. Atom, molecule or ion? H2H2
17. Atom, molecule or ion? Cl -
18. If my electron configuration is 2,8,1; what group am I in? 19. What period am I in?
20. Why does sodium chloride have a high melting point? 21. Why are salt crystals cubic? 22. Why don’t salt crystals conduct electricity?
23. Why does melted salt or salt solution conduct electricity?
24. What’s the formula? Water Sodium chloride Hydrogen Chlorine Sodium hydroxide
25. Give any trends. NameHardnessDensity g/cm 3 Melting point o C LithiumFairly hard to cut SodiumEasy to cut PotassiumVery easy to cut
26. What do they mean? H 2 O (l) Na (s) Cl 2 (g) NaCl (s) NaCl (aq)
27. What happens to a chlorine atom when it reacts? Cl 2.8.7
28. What happens to a sodium atom when it reacts? Na 2.8.1
29. Give the ion for: Sodium Magnesium Aluminium Fluorine Oxygen
1. What does this symbol mean? 2. Sodium has this hazard symbol - what precautions should you take when using it? corrosive Goggles, pick up with tweezers,
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