Maths
Biology
Chemistry
English Lang.
History
Responding to change (a2 only)
Infection and response
Energy transfers (a2 only)
Homeostasis and response
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
World war two & the holocaust
2d religious conflict and the church in england, c1529-c1570
1c the tudors: england, 1485-1603
Inter-war germany
The fight for female suffrage
Britain & the wider world: 1745 -1901
Medieval period: 1066 -1509
1f industrialisation and the people: britain, c1783-1885
1l the quest for political stability: germany, 1871-1991
2m wars and welfare: britain in transition, 1906-1957
The cold war
2n revolution and dictatorship: russia, 1917-1953
1d stuart britain and the crisis of monarchy, 1603-1702
World war one
Britain: 1509 -1745
Show all topics
2
Keira Bains
@keirakaurr
·
23 Followers
Follow
Atomic Structure and Particles: A Comprehensive Guide
This guide provides an in-depth look at atomic structure, covering the fundamental particles that make up atoms, their properties, and how they interact. It explores the concept of atomic charge, the structure of the nucleus, and the arrangement of electrons. The guide also delves into the differences between atoms and ions, making it an essential resource for students studying atomic structure notes at various levels.
21/10/2022
3989
This section explores the visual representation of atomic structure and the use of nuclear symbols to convey important information about elements.
A typical structure of atom diagram includes:
Highlight: The electron shells are not to scale in most diagrams, as they would be much larger relative to the nucleus in reality.
Nuclear symbols provide a concise way to represent the composition of an atom's nucleus.
Definition: A nuclear symbol is a shorthand notation that shows the number of protons and neutrons in an atom's nucleus.
The format of a nuclear symbol is:
A
X
Z
Where:
Example: The nuclear symbol for sodium is:
23
Na
11
This symbol indicates that sodium has 11 protons and 12 neutrons (23 - 11 = 12).
Grasping the concepts of atomic structure is crucial for students in various science classes, from Class 7 through Class 10 and beyond. It forms the foundation for understanding chemical reactions, periodic trends, and more advanced topics in chemistry and physics.
Highlight: Knowledge of atomic structure is essential for comprehending how elements combine to form compounds and how chemical reactions occur.
By mastering these concepts, students will be well-prepared to tackle more complex topics in chemistry and physics, making this guide an invaluable resource for those studying atomic structure KS3 or preparing for higher-level courses.
Atoms are the building blocks of all matter, including living things. They are incredibly small, beyond the reach of even powerful microscopes. Each atom is composed of three main types of particles: protons, neutrons, and electrons.
Definition: An atom is the smallest unit of matter that retains the properties of an element.
The nucleus is the dense central core of an atom, containing protons and neutrons.
Highlight: The nucleus contains nearly all of the atom's mass and has a positive charge due to the presence of protons.
Vocabulary: Protons are subatomic particles with a positive electric charge.
Example: The term "neutron" comes from "neutral," reflecting its lack of electric charge.
Highlight: Electrons are much smaller than protons and neutrons but occupy a large space around the nucleus.
In a neutral atom, the number of protons equals the number of electrons, resulting in an overall neutral charge.
Definition: The atomic number of an element is equal to the number of protons in its nucleus.
To determine the number of neutrons in an atom:
Example: For sodium (Na) with mass number 23 and atomic number 11, the number of neutrons is 23 - 11 = 12.
Ions are atoms or groups of atoms that have gained or lost electrons, resulting in a net electric charge.
Definition: An ion is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Example: An ion with a charge of -2 has two more electrons than protons.
10
128
9
atomic structure
atomic structure
5
46
11/9
Atoms
definition of electrons , neutrons and more
22
181
9
Chemistry - End of Year
That brief overview of all the major concepts in Chemistry that you needed before your exams! Covers Atomic Structure, Chemical Bonding and Organic Chemistry, with definitions, concepts and more for each!
9
228
10/11
GCSE AQA CHEMISTRY : Structure & Bonding
Here are my notes from GCSEs for all the content you need to know for this topic of Chemistry ; I hope they are useful :)
1
267
10/11
Covalent bonding
Shows what covalent bonds are, what covalent bonds are formed with as well as their diagrams. Also the 3D model, examples of types of substances they make and examples of their structures.
16
830
11/9
Moles
Moles for AQA GCSE quantitative chemistry :)
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
Sign up to see the content. It's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Keira Bains
@keirakaurr
·
23 Followers
Follow
Atomic Structure and Particles: A Comprehensive Guide
This guide provides an in-depth look at atomic structure, covering the fundamental particles that make up atoms, their properties, and how they interact. It explores the concept of atomic charge, the structure of the nucleus, and the arrangement of electrons. The guide also delves into the differences between atoms and ions, making it an essential resource for students studying atomic structure notes at various levels.
This section explores the visual representation of atomic structure and the use of nuclear symbols to convey important information about elements.
A typical structure of atom diagram includes:
Highlight: The electron shells are not to scale in most diagrams, as they would be much larger relative to the nucleus in reality.
Nuclear symbols provide a concise way to represent the composition of an atom's nucleus.
Definition: A nuclear symbol is a shorthand notation that shows the number of protons and neutrons in an atom's nucleus.
The format of a nuclear symbol is:
A
X
Z
Where:
Example: The nuclear symbol for sodium is:
23
Na
11
This symbol indicates that sodium has 11 protons and 12 neutrons (23 - 11 = 12).
Grasping the concepts of atomic structure is crucial for students in various science classes, from Class 7 through Class 10 and beyond. It forms the foundation for understanding chemical reactions, periodic trends, and more advanced topics in chemistry and physics.
Highlight: Knowledge of atomic structure is essential for comprehending how elements combine to form compounds and how chemical reactions occur.
By mastering these concepts, students will be well-prepared to tackle more complex topics in chemistry and physics, making this guide an invaluable resource for those studying atomic structure KS3 or preparing for higher-level courses.
Atoms are the building blocks of all matter, including living things. They are incredibly small, beyond the reach of even powerful microscopes. Each atom is composed of three main types of particles: protons, neutrons, and electrons.
Definition: An atom is the smallest unit of matter that retains the properties of an element.
The nucleus is the dense central core of an atom, containing protons and neutrons.
Highlight: The nucleus contains nearly all of the atom's mass and has a positive charge due to the presence of protons.
Vocabulary: Protons are subatomic particles with a positive electric charge.
Example: The term "neutron" comes from "neutral," reflecting its lack of electric charge.
Highlight: Electrons are much smaller than protons and neutrons but occupy a large space around the nucleus.
In a neutral atom, the number of protons equals the number of electrons, resulting in an overall neutral charge.
Definition: The atomic number of an element is equal to the number of protons in its nucleus.
To determine the number of neutrons in an atom:
Example: For sodium (Na) with mass number 23 and atomic number 11, the number of neutrons is 23 - 11 = 12.
Ions are atoms or groups of atoms that have gained or lost electrons, resulting in a net electric charge.
Definition: An ion is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Example: An ion with a charge of -2 has two more electrons than protons.
Chemistry - atomic structure
atomic structure
10
128
1
Chemistry - Atoms
definition of electrons , neutrons and more
5
46
0
Chemistry - Chemistry - End of Year
That brief overview of all the major concepts in Chemistry that you needed before your exams! Covers Atomic Structure, Chemical Bonding and Organic Chemistry, with definitions, concepts and more for each!
22
181
2
Chemistry - GCSE AQA CHEMISTRY : Structure & Bonding
Here are my notes from GCSEs for all the content you need to know for this topic of Chemistry ; I hope they are useful :)
9
228
0
Chemistry - Covalent bonding
Shows what covalent bonds are, what covalent bonds are formed with as well as their diagrams. Also the 3D model, examples of types of substances they make and examples of their structures.
1
267
0
Chemistry - Moles
Moles for AQA GCSE quantitative chemistry :)
16
830
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