Tuesday 29 March 2016
2.13 describe the relative reactivities of the elements in group 7
The elements of group 7 get less reactive as you go down. This is because, at the top of the group, the incomplete shell is near to the nucleus, so the pull from the positive nucleus is greater. Therefore, as you go down the pull from the nucleus gets weaker, so it is easier to 'get rid' of electrons.
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I'm sorry but you've made a mistake. Check hannahhelpchemistry.blogspot.co.uk to see the right answer. You got this completely mixed up I'm afraid
ReplyDeleteHi, I have not come across Hannah before but have just checked her out (great blog) - it appears we use the same resources for our revision and what I state here is the very similar to what she states (it implies the same concepts) - I have also just googled it to double check. Whilst Hannah describes a decreasing reactivity as it being harder to gain electrons, I described it as being easier to lose electrons. This is the same concept and both statements result in the knowledge that a decrease in the affinity for electrons results from a decrease in reactivity.
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