Exam (elaborations)
AQA A LEVEL CHEMISTRY PAPER 1 June 2024 Exam Questions and Answers
- Course
- Institution
AQA A LEVEL CHEMISTRY PAPER 1 June 2024 Exam Questions and Answers
[Show more]
Content preview
AQA A LEVEL CHEMISTRY PAPER1 June 2024 Exam
Questions and Answers
TOF steps - Answer>> 1) ionisation
2) acceleration
3) ion drift
4) detection
5) analysis
Electron impact - Answer>> Sample vaporised and electron
gun fires high energy electrons at it which knock off 1 electron
from each particle, making them 1+ ions
NB- can knock off more than one e or break molecular ion
electrospray ionization - Answer>> Sample dissolved in volatile
solvent then injected through needle to give fine mist which is
attached to positive end of high voltage power supply, particles
gain proton
NB- Mr of substance is actually one less than shown due to extra
H+
Acceleration (TOF) - Answer>> positive ions accelerated using
electric field so they all have the same kinetic energy
Ion drift (TOF) - Answer>> particles with small mass have
larger velocity do ions start to separate with lightest ions reaching
detector first
Detection (TOF) - Answer>> positive ions hit negatively
charged plate and gain an electron which forms a current, the
larger the current the higher the abundance
, Analysis (TOF) - Answer>> -computer uses data to produce
mass spectrum which shows mass m / charge z ratio
-mr or ar is furthest right peak (small peaks larger than mr are due
to isotopes)
-may be large peaks at lower mr due to fragmentation
Electron spin - Answer>> Property of electron (CW or ACW)
Represented by up and down arrows
Orbitals - Answer>> Defined regions of space around nucleus
where electrons most likely to be found, each orbital holds 2
electrons
Hund's Rule - Answer>> Electrons prefer to occupy orbitals on
their own and only pair up when no empty or bait ask of same
energy are available
Electron configuration - Answer>> 1s2 2s2 2p6 3s2 3p6 4s2
3d10 4p6 4d10
exceptions to electron configuration - Answer>> chromium and
copper, only take one electron in 4s orbital
Why does ionization energy decrease down a group? -
Answer>> Atoms get bigger so electrons further away from
nucleus, greater shielding
Why does ionization energy increase across a period? -
Answer>> Atoms get smaller, nuclear charge increases, similar
shielding
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 RevisionKing. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.29. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79650 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now