Group VII : the halogens

 

1.  Group VII  elements are ____________ ( metals/non-metals )

2.  Name the five halogens.

3. Write the three main physical properties of halogens.

4.  Which has higher density — fluorine or bromine?

5.  Which has higher boiling point — iodine or chlorine?

6.  What colour are halogens at room temperature?

7.  Halogens react with metals to form compounds called ____________.

8.         Iron  +  Fluorine  à  _____________

9.  Why do halogens react in a similar way?

10. Why do nurses wipe our skin with a solution of iodine in ethanol before taking blood?

11.  Why are halogens so reactive? Why does reactivity decrease down Group VII?

12.  When halogen atoms react with metal atoms, they _________ ( give up/ accept ) electrons forming  _________ ( ionic/covalent ) bonds.

13.       Cl  +   2KBr     à    _______     +   _______

14.       Br2   +   2KI      à      _______    +   _______

 

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