12.4 (Halogen reactivity Home Work ).pdf
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Halogen reactivity HW
12.4 (Halogen reactivity Home Work ).pdf
- 1. SC12.4w 6 Halogen reactivity Homework 1 © Pearson Education Ltd 2019 Copying permitted for purchasing institution only. This material is not copyright free. Name Class Date 1 Tick the correct box to say whether these statements are true or false. a The order of increasing reactivity of group 7 elements is Cl2<Br2<F2<I2. b Chlorine will displace bromine from sodium bromide solution. c Iodine will displace fluorine from lithium fluoride solution. d The reactivity of halogens decreases as their atomic size increases. 2 Rewrite the false statements from question 1 to make them correct. True False ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ 3 Join up the correct starts and ends of these sentences about fluorine. The halogen fluorine is the … occupied electron shells than other halogens. When fluorine reacts it forms … electrons more easily than other halogens. Fluorine atoms have fewer … fluoride ions by gaining electrons. The fluorine atoms gain … most reactive in the group. 4 Astatine, symbol At, is found at the bottom of group 7. a Using the pattern of reactivity of the other halogens, predict the relative reactivity of astatine and justify your answer. __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ b Explain the relative reactivity of astatine with reference to its atomic structure. __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ c Complete the following chemical equations. i sodium + astatine ______________ _______________ ii Br2(aq) + 2KAt(aq) ____________ + ___________