100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
Previously searched by you
Summary Edexcel A Level Chemistry Unit 1 - Atomic Structure and the Periodic Table notes written by a 3A* Imperial College London Medicine Student$0.00
Summary Edexcel A Level Chemistry Unit 1 - Atomic Structure and the Periodic Table notes written by a 3A* Imperial College London Medicine Student
28 views 3 purchases
Course
Unit 1 - Atomic Structure and the Periodic Table
Institution
PEARSON (PEARSON)
Book
George Facer\'s Edexcel A Level Chemistry Student Book 1
Highly detailed notes on Unit 1 - Atomic Structure and the Periodic Table Edexcel A-Level Chemistry. Covers all the specification points of unit 1. Contains all the information needed for this topic and allowed me to achieve an A* in chemistry. Covers the definitions needed, mass spectrometry, anal...
Chapter 2 atomic structure and the periodic table (topic 1)
March 25, 2023
29
2022/2023
Summary
Subjects
atom
mass
relative molecular mass
relative atomic mass
isotopes
neutron
electron
proton
atomic number
mass number
relative isotopic mass
mass spectrometry
ionisation
deflection
detection
mass spectra
Connected book
Book Title:
Author(s):
Edition:
ISBN:
Edition:
More summaries for
A Level Chemistry Edexcel Unit 8 - Energetics I notes written by a 3A* Imperial College London Medicine Student
A Level Edexcel Chemistry Unit 7 - Modern Analytical Techniques I notes written by a 3A* Imperial College London Medicine Student
A Level Edexcel Unit 6 - Organic Chemistry I notes written by a 3A* Imperial College London Medicine Student
All for this textbook (8)
Written for
A/AS Level
PEARSON (PEARSON)
Chemistry 2015
Unit 1 - Atomic Structure and the Periodic Table
All documents for this subject (36)
Seller
Follow
thomaswong180805
Reviews received
Content preview
⚛
1-Atomic Structure and the
Periodic Table
Relative Atomic Mass
The Nuclear Atom
Mass Spectrometry
Mass Spectrum
Molecular Mass from Mass Spectra
RAM from Mass Spectrometers
Electron Configuration
Evidence for Electron Configuration
Atomic Orbitals
Filling Orbitals
List Notation
Ionisation Energy
Explaining Patterns in Ionisation Energies
First Ionisation Energies
Successive Ionisation Energies
Periodicity
Melting Temperatures
Valency
Atomic Radius
Trends across a Period
1-Atomic Structure and the Periodic Table 1
, Trends in a Group
Size of Positive Ions
Size of Negative Ions
Electron Affinity
Relative Atomic Mass
The atoms of each type of element have a Relative Atomic Mass (RAM or Ar).
What is Relative Atomic Mass?
The average mass of one atom compared to one twelfth of the mass of one
atom of carbon-12.
The RAM takes account of the abundances of the different isotopes.
Ar = Average mass of an atom / 1/12th mass of 1 atom of 12 C
E.g. Magnesium exists as 3 isotopes: 24-mg (78.6%), 25-mg (10.11%) and 26-
mg (11.29%).
24x78.6/100 + 25x10.11/100 + 26x11.29/100 = 24.33 RAM has no units.
What is Relative Molecular Mass?
The ratio of the average mass of one molecule of an element or compound to one
twelfth of the mass of an atom of carbon-12.
The element Carbon is the atom that the mass of all other atoms is compared to -
Carbon has a RAM of 12.
The lightest atom is hydrogen - it has 1/12 the mass of carbon and so has a RAM of
1. Magnesium is twice as heavy as carbon - it has a RAM of 24.
Atoms are made from even smaller particles (subatomic particles):
Protons, Neutrons and Electrons.
Where are Protons, Neutrons and Electrons located?
Protons and Neutrons exist in a dense core at the centre of an atom - the
Nucleus.
The Electrons are spread out around the edge of the atom. They orbit the nucleus
in layers - Shells.
1-Atomic Structure and the Periodic Table 2
, 2 Important properties of Subatomic particles:
Mass and Charge.
The atoms of any element always contain the same number of protons - hydrogen
atoms always contain 1 proton and carbon atoms always contain 6 protons.
What is the number of protons in an atom known as?
The Atomic Number or Proton Number - the smaller number shown on the
periodic table.
What is the sum of protons and neutrons in an atom's nucleus known as?
The Mass Number - the larger number shown in the periodic table.
Mass Number = Number of Protons + Number of Neutrons
Number of Neutrons = Mass Number - Atomic Number (No.
Protons)
1-Atomic Structure and the Periodic Table 3
, The Nuclear Atom
What are Atoms?
The smallest uncharged particles into which an element can be divided and still
remain their characteristic properties.
What is the Nucleus?
The tiny, dense, positively charged centre of an atom composed of protons and
neutrons.
What is a Proton?
A positively charged subatomic particle found in the nucleus.
What is a Neutron?
A subatomic particle found in the nucleus which has zero charge and (nearly) the
same mass as the proton.
What is an Electron?
A negatively charged subatomic particle is about 1/1836 of the mass of a proton.
In neutral atoms, the number of electrons = the number of protons. It is only the
outer (valence shell) electrons that take part in bonding and in chemical reactions.
An atom contains a small, central, positively charged nucleus.
The diameter of the nucleus is about 1/10000 that of the atom.
Almost all the mass of an atom is concentrated in the nucleus.
Electrons orbit the nucleus.
What is an Isotope?
Atoms which contain the same number of protons but different numbers of
neutrons.
Isotopes of the same element have the same chemical properties as they all have
the same electron configurations.
What is the Atomic Number?
The number of protons in the nucleus of the atom.
The same number as the proton number.
1-Atomic Structure and the Periodic Table 4
, What is the Mass Number?
The number of protons + the number of neutrons.
What is the Relative Isotopic Mass?
Relative isotopic mass is the mass of an atom of an isotope of an element relative
to 1/12th the atomic mass of an atom of carbon-12.
Mass Spectrometry
What is a Mass Spectrometer used for?
To measure the masses of atoms, molecules and fragments of molecules.
What are the 4 stages of Mass Spectrometry?
Ionisation
Acceleration
Deflection
Detection
IADD
1-Atomic Structure and the Periodic Table 5
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 thomaswong180805. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $0.00. You're not tied to anything after your purchase.
