Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
@d!_†oX!©:
--- Quote from: buzywidbizworld on November 11, 2009, 02:42:15 pm ---hi
cud u also help me to ans this?
q- why should you be able to predict that metals such as iron and chromium have more thn one oxidation state?
wa8in 4 da reply.
--- End quote ---
1)because they are transition metals
2)due to their presence in different forms...ex, FeSO4 and FeCl3
Saladin:
for adi toxic's second point, its restating what they said in the q. unless u are given examples of same metals reacting differently, u shud not give the second point.
@d!_†oX!©:
i think u should cuz just stating that they are transition metals doesn't score u full marks...if i remember correctly i have seen this point in some mark scheme
buzywidbizworld:
Thanks guys
but Dude aditoxic was ri8 wid da eg.
Saladin:
i do a level u see, i am starting to think more like an Edexcel markscheme. srry adi toxic, if u felt insulted!! :-[
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