Maths
Biology
Chemistry
English Lang.
History
Energy transfers (a2 only)
Infection and response
Homeostasis and response
Responding to change (a2 only)
Cell biology
Biological molecules
Organisation
Substance exchange
The control of gene expression (a2 only)
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
Show all topics
1l the quest for political stability: germany, 1871-1991
1f industrialisation and the people: britain, c1783-1885
Inter-war germany
1c the tudors: england, 1485-1603
The cold war
Medieval period: 1066 -1509
Britain & the wider world: 1745 -1901
2m wars and welfare: britain in transition, 1906-1957
2d religious conflict and the church in england, c1529-c1570
World war two & the holocaust
2j america: a nation divided, c1845-1877
2n revolution and dictatorship: russia, 1917-1953
The fight for female suffrage
World war one
Britain: 1509 -1745
Show all topics
Jenna
@jenna_cp06
·
11 Followers
Follow
National 5 Chemistry covers key topics including rates of reaction, the periodic table, and atomic structure. This summary provides an overview of essential concepts, formulas, and examples to help students prepare for exams and assignments.
26/03/2023
477
This section introduces the organization of the periodic table and classification of elements in National 5 Chemistry.
Elements are classified in various ways:
Definition: A group is a column of elements in the periodic table, while a period is a row of elements.
The section highlights important groups:
Highlight: Elements within a group share the same valency and have similar chemical properties due to having the same number of outer electrons.
The section also covers key chemistry vocabulary:
Vocabulary:
- Mixture: Two or more substances together without reacting
- Solution: A mixture formed when a solute dissolves in a solvent
- Soluble: Describes a substance that dissolves in a liquid
- Insoluble: Describes a substance that does not dissolve in a liquid
- Saturated solution: A solution in which no more substance can be dissolved at a given temperature
- Dilute solution: A solution with a lower concentration of dissolved substance than a concentrated solution
The section concludes with information on identifying chemical reactions and distinguishing between exothermic and endothermic reactions.
This section delves deeper into atomic structure and covalent bonding for National 5 Chemistry Unit 1.
Definition: An atom consists of a nucleus containing protons and neutrons, with electrons orbiting in energy levels.
The section explains the charges of subatomic particles and introduces the concept of atomic number and mass number.
Vocabulary: Isotopes are atoms with the same atomic number but different mass numbers.
The relative atomic mass is introduced as the average mass of all isotopes of an element, with a formula provided for its calculation.
The section then transitions to covalent bonding:
Definition: A covalent bond forms when two positive nuclei are held together by their common attraction for a shared pair of electrons.
Key points about covalent bonding include:
The section concludes by mentioning that the shape of simple covalent molecules depends on various factors, setting the stage for further discussion in subsequent units.
National 5 Chemistry Unit 1 focuses on chemical changes, structure, and rates of reaction. Key topics include:
This foundational unit provides crucial knowledge for understanding chemical processes and structures at the National 5 level.
This section covers the fundamentals of reaction rates and factors that influence them in National 5 Chemistry.
Definition: The rate of reaction is calculated using the formula: rate = Δ quantity / Δ time
Factors that increase reaction rates include:
Vocabulary: Catalysts are substances that speed up chemical reactions without being consumed. They can be heterogeneous (different state from reactants) or homogeneous (same state as reactants).
Example: Enzymes are biological catalysts that speed up reactions in living cells.
The section also covers methods for following reactions by measuring changes in concentration, mass, or volume of reactants and products.
Highlight: The rate of reaction at a given stage is calculated using the formula: rate = 1 / t
An example graph is provided to illustrate how to calculate the rate of reaction during the first 120 seconds of a gas-producing reaction.
4
287
12/13
BONDING & SHAPES | AS AQA Physical Chemistry
contains notes on: ionic bonding, covalent & dative bonding, metallic bonding and trends, types of solid structures, shapes of simple molecules and ions, bond polarity, van der waals, induced dipoles, dipole dipole & hydrogen bonds
6
163
13
Shape of Molecules
VSEPR Theory, Shape of Molecules, Bond Angles, Drawings
4
83
12/13
2.1. Periodicity
AS Periodicty class notes
15
258
12/13
3.6 Shapes of Molecules
Summary of all the shapes of Molecules in Bonding
4
82
12/13
Structure, Bonding and Periodicity Topic Questions!
Questions on the topic
6
295
12/13
Chemistry edexcel topic 2 a level
Notes on everything you need to know
Average app rating
Pupils love Knowunity
In education app charts in 12 countries
Students have uploaded notes
iOS User
Philip, iOS User
Lena, iOS user
Jenna
@jenna_cp06
·
11 Followers
Follow
National 5 Chemistry covers key topics including rates of reaction, the periodic table, and atomic structure. This summary provides an overview of essential concepts, formulas, and examples to help students prepare for exams and assignments.
This section introduces the organization of the periodic table and classification of elements in National 5 Chemistry.
Elements are classified in various ways:
Definition: A group is a column of elements in the periodic table, while a period is a row of elements.
The section highlights important groups:
Highlight: Elements within a group share the same valency and have similar chemical properties due to having the same number of outer electrons.
The section also covers key chemistry vocabulary:
Vocabulary:
- Mixture: Two or more substances together without reacting
- Solution: A mixture formed when a solute dissolves in a solvent
- Soluble: Describes a substance that dissolves in a liquid
- Insoluble: Describes a substance that does not dissolve in a liquid
- Saturated solution: A solution in which no more substance can be dissolved at a given temperature
- Dilute solution: A solution with a lower concentration of dissolved substance than a concentrated solution
The section concludes with information on identifying chemical reactions and distinguishing between exothermic and endothermic reactions.
This section delves deeper into atomic structure and covalent bonding for National 5 Chemistry Unit 1.
Definition: An atom consists of a nucleus containing protons and neutrons, with electrons orbiting in energy levels.
The section explains the charges of subatomic particles and introduces the concept of atomic number and mass number.
Vocabulary: Isotopes are atoms with the same atomic number but different mass numbers.
The relative atomic mass is introduced as the average mass of all isotopes of an element, with a formula provided for its calculation.
The section then transitions to covalent bonding:
Definition: A covalent bond forms when two positive nuclei are held together by their common attraction for a shared pair of electrons.
Key points about covalent bonding include:
The section concludes by mentioning that the shape of simple covalent molecules depends on various factors, setting the stage for further discussion in subsequent units.
National 5 Chemistry Unit 1 focuses on chemical changes, structure, and rates of reaction. Key topics include:
This foundational unit provides crucial knowledge for understanding chemical processes and structures at the National 5 level.
This section covers the fundamentals of reaction rates and factors that influence them in National 5 Chemistry.
Definition: The rate of reaction is calculated using the formula: rate = Δ quantity / Δ time
Factors that increase reaction rates include:
Vocabulary: Catalysts are substances that speed up chemical reactions without being consumed. They can be heterogeneous (different state from reactants) or homogeneous (same state as reactants).
Example: Enzymes are biological catalysts that speed up reactions in living cells.
The section also covers methods for following reactions by measuring changes in concentration, mass, or volume of reactants and products.
Highlight: The rate of reaction at a given stage is calculated using the formula: rate = 1 / t
An example graph is provided to illustrate how to calculate the rate of reaction during the first 120 seconds of a gas-producing reaction.
Chemistry - BONDING & SHAPES | AS AQA Physical Chemistry
contains notes on: ionic bonding, covalent & dative bonding, metallic bonding and trends, types of solid structures, shapes of simple molecules and ions, bond polarity, van der waals, induced dipoles, dipole dipole & hydrogen bonds
4
287
0
Chemistry - Shape of Molecules
VSEPR Theory, Shape of Molecules, Bond Angles, Drawings
6
163
0
Chemistry - 2.1. Periodicity
AS Periodicty class notes
4
83
0
Chemistry - 3.6 Shapes of Molecules
Summary of all the shapes of Molecules in Bonding
15
258
0
Chemistry - Structure, Bonding and Periodicity Topic Questions!
Questions on the topic
4
82
0
Chemistry - Chemistry edexcel topic 2 a level
Notes on everything you need to know
6
295
0
Average app rating
Pupils love Knowunity
In education app charts in 12 countries
Students have uploaded notes
iOS User
Philip, iOS User
Lena, iOS user
