Exam (elaborations)
PCAT: Chemistry Questions and Answers with 100% Complete Solutions | verified &updated 2024
- Course
- Institution
PCAT: Chemistry Questions and Answers with 100% Complete Solutions | verified &updated 2024
[Show more]
Content preview
PCAT: Chemistry Questions and Answerswith 100% Complete Solutions | verified
&updated 2024
Formula - ✔✔The formula for an ionic compound always gives the simplest
whole number ratio of the ions that yields electrical neutrality
Naming - ✔✔1) Use a two word name, the first word for the cation, the
second word for the anion
2) For monatomic cations, give the element's name
3) For monatomic anions affix an -ide ending to the stem of the elements name
4) Use the unadjusted given name for polyatomic ions
,5) For cations that exhibit more than one common ion charge indicate the
charge with a roman numeral after the elements name. Use -ous and -ic endings
to differentiate the two ions
Quantum numbers - ✔✔Use the four quantum numbers (n, l, ml, ms)
to characterize each electron in the atom
n - ✔✔indicates the shell the electron is in
l - ✔✔indicates the subtle the electron is in
ml - ✔✔indicates the orbital the electron is in
ms - ✔✔indicates the electrons spin orientation
,Pauli exclusion principle - ✔✔No two electrons in the same atom can have
the same set of four quantum number
What is the maximum number of electrons per shell? - ✔✔2n2
Fill in the subshells - ✔✔
Predicting subshell energy separations - ✔✔The energy difference between two
subshells are that in different shells is greater than the energy difference
between two subshells that are in the same shell. The energy difference between
2s and 4p is greater than the energy difference between 4s and 4d
Predicting ion charges - ✔✔Many elements form ions with either eight or
zero valence electrons
, Diamagnetic - ✔✔an element that has two electrons in all of its occupied
orbitals. A diamagnetic substance is repelled by an external magnetic field
Paramagnetic - ✔✔an element that has at least one orbital with only one
electron in it. A paramagnetic substance is attracted by an external magnetic field
Counting the number of unpaired electrons - ✔✔A upe is an electron that is
the sole occupant of an orbital. Thus an orbital with one electron in it counts as
one up. Diamagnetic substances have zero upe's
Periodic table - ✔✔1) The maximum number of electrons per row is given by 2n2
2) Elements in a column have the same number of valence electrons
3) Elements in a row hove their outermost electrons in the same shell
4) The halogens ranged from light lightest to heaviest are Fl, Cl, Br, I
5) Noble gases ranged from lightest to heaviest are He, Ar, Kr, Xe, Rd
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Examsplug. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now