Turn on thread page Beta
    • Thread Starter
    Offline

    14
    Is it in order of atomic mass or atomic number ?
    • Community Assistant
    • Study Helper
    Offline

    17
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by Questioness)
    Is in in order of atomic mass or atomic number ?
    If you go with atomic mass it allows you to extend the rules to include isotopes, eg:

    CDH=CClCH3
    Offline

    3
    ReputationRep:
    (Original post by Questioness)
    Is it in order of atomic mass or atomic number ?
    Whilst the choice between atomic number vs. atomic mass is unlikely to be of any consequence in assigning priority the original CIP rules are based on assigning priority to the highest atomic number. If atomic numbers are the same then the higher isotopic mass takes priority. If you get an exam question that asks how priority is assigned you should say by atomic number. I wrote to OCR to check how they want assignments to be made. Answer - atomic number.
    • Thread Starter
    Offline

    14
    (Original post by TeachChemistry)
    Whilst the choice between atomic number vs. atomic mass is unlikely to be of any consequence in assigning priority the original CIP rules are based on assigning priority to the highest atomic number. If atomic numbers are the same then the higher isotopic mass takes priority. If you get an exam question that asks how priority is assigned you should say by atomic number. I wrote to OCR to check how they want assignments to be made. Answer - atomic number.
    Okay, thank you. I was a little confused with different sites saying different things.
 
 
 

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.