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Quiz on the halogens. Using the quiz … Click through the quiz to see the questions and answers. Remember it is MUCH better to try to think of the answer,

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Presentation on theme: "Quiz on the halogens. Using the quiz … Click through the quiz to see the questions and answers. Remember it is MUCH better to try to think of the answer,"— Presentation transcript:

1 Quiz on the halogens

2 Using the quiz … Click through the quiz to see the questions and answers. Remember it is MUCH better to try to think of the answer, rather than just clicking to read it.

3 1. Which group of the Periodic Table are the halogens in ? Group 7 Answer Next question

4 2. Fluorine is the first halogen in the Periodic Table. Name the next three in the group Chlorine Bromine Iodine Answer Next question

5 3. What colour is chlorine gas? Yellow / green Answer Next question

6 4. Which halogen is purple ? iodine ( though the solid can look more grey than purple; the solution and gas are distinctly purple) Answer Next question

7 5. What colour is bromine liquid? red Answer Next question

8 6. The boiling point of chlorine is -34 o C. What state is it in a room temperature? - and explain your answer It is a gas. Room temperature is above its boiling point, so if you imagine heating it up from a very low temperature, it boils (ie turns into a gas) before it reaches room temperature Answer Next question

9 7. How many electrons do all halogens have in their outer shell ? 7 Answer Next question

10 8. Explain why halogens react violently with Group 1 elements Each halogen atom needs one electron to complete its outer shell. Each Group 1 atom needs to get rid of one electron to complete its outer shell : a perfect match! Answer Next question

11 9. Which is more reactive : fluorine (atomic number 9 ) or chlorine ( atomic number 17) ? Fluorine is the most reactive halogen Answer Next question

12 10. What - if anything - happens when you mix chlorine water with sodium bromide solution ? The yellow colour of the chlorine water is replaced by a red/brown colour. You now have bromine water and sodium chloride solution Answer Next question

13 11. What - if anything - happens when you mix iodine water with sodium bromide solution ? Nothing happens because the iodine is less reactive so it does not displace the bromine from the sodium bromide compound Answer Next question

14 12. Explain why fluorine is the most reactive of the halogens There is only one complete inner shell and this does not provide much shielding of the positive charge on the nucleus. This means there is a strong attraction for an electron to join the atom Answer Next slide

15 That was the last question. I hope you got all the answers correct ! Try again Exit quiz


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