CHEM10003 No Periodic Table??

[mc1316]

We were told there would be no periodic table given to us. This is a question from a past paper, how on earth am i suppose to do this without a periodic table?

Consider the following species: O2-, F-, Na+, Al3+, S2- and ClWhen these ions are arranged in order from the smallest ion to the largest ion the order is:

[simpak]

Lol.  You're meant to memorise the trends and know roughly where they sit on the table.  So you should know how things get smaller and larger across the periodic table.  You should really know where those sit by the time you get to the exam.

[Shenz0r]

http://www.youtube.com/watch?v=zUDDiWtFtEM

[LeviLamp]

Haha, ASPScience is the best.

Also, my Chem tutor and Brendan Abrahams (who is an amazing person, just putting that out there) both said we're expected to know the first 36 or 40 elements and all trends covered in the lecture notes. Molar masses are all given to us, but we need to know things like Period 3+ elements on can access their d orbitals, where each element sits period-wise and group-wise and obviously their atomic numbers (and then all of the lectures on elements this week are relevant to that as well). What I'm saying is from the notes I've taken during the lectures and from what my tutor has mentioned so I'm going to hope what I'm saying is actually correct :s

[simpak]

Yup, based on what I can recall from Chem 1, that is correct.  You just need to know basically where the atoms are - you should know at least the first 20 based on atomic number for Chem 1 (you'll need to know more than this for Chem 2 when you do transition metals in detail) and then you should be able to figure out some others and their location on the table by remembering their groups (eg S and O must be similar because S is directly under O; because it has a higher atomic number it must be larger than O, so that would help you answer the question from the OP).

But you don't have to remember any molar masses or anything like that, it will always be given to you!  Just the locations and then the trends, as stated above.