Summary
Summary OCR A level Notes - Foundations in Chemistry
- Course
- Institution
Summary of 9 pages for the course Unit 2 at OCR (Specification Notes)
[Show more]
Seller
Follow
sanchijoshi
Content preview
Foundations in ChemistryATOMIC STRUCTURE AND ISOTOPES : 2.1.1
what is an isotope
isotopes are different forms of elements where the number of neutrons is
different but the proton number is the same
number of electrons are also the same so chemical properties are the same
what are the different models for atomic structure
plum pudding model - ball of positive charge with electrons embedded
rutherford model - gold alpha particles fired
deflection showed the concentrated positive mass in the nucleus
most particles moved straight through showing that atom is mostly
empty space
james chadwick discovers the neutron
neils bohr model = modern version
what is relative isotopic mass
relative isotopic mass is the relative mass of isotopes of an element relative
to 1/12th of the weighted mass of a carbon 12 atom
what is relative atomic mass
mean weighted mass of an atom relative to 1/12th the mass of a carbon 12
what is mass spectrometry
determine the m/z ratio to find the relative atomic mass of the atom
highest m/z = Mr
ionisation
acceleration
deflection
Foundations in Chemistry 1
, detection
COMPOUNDS , FORMULAE AND EQUATIONS : 2.1.2
what are the formulae for nitrate carbonate sulphate hydroxide ammonia zinc
and silver ions
NO3-
CO3 2-
SO4 2-
OH-
NH3+
Zn 2+
Ag+
AMOUNT OF SUBSTANCE : 2.1.3
what is a mole
the unit of measurement for an amount of a substance
what is avogadro's constant
6.022 x 10^23
what is empirical formula
simplest ratio of elemnts in a compound
what is molecular formula
a chemical formula which shows all the the elements found in the
compound
what does anhydrous mean
containing no water molecules
the ideal gas equation
pv=nRt
Foundations in Chemistry 2
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller sanchijoshi. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R98,04. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
85443 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now