GCSE Physics (Combined) AQA
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80 topics in 8 modules
☑️ Atomic structure and the periodic table 20 topics
- Understanding the Structure of an Atom: Protons, Neutrons, and Electrons
- Distinguishing between Atomic Number and Mass Number
- Understanding Isotopes and their Occurrence
- Evolution of the Atomic Model: From Dalton to Bohr and Beyond
- Mastery of Key Terminology: Atoms, Elements, Compounds, and Molecules
- Building Blocks of Matter: The Periodic Table and its Organization
- Diving Deep into Elements: Groups and Periods in the Periodic Table
- Know your Elements: Named Groups and their Properties (Alkali Metals, Noble Gases, etc.)
- Chemical Bonds 101: Ionic, Covalent, and Metallic Bonds
- Nuclear Chemistry: Radioactive Decay, Half-life, and Isotope Dating
- Understanding Ionization and Ionization Energy
- Mastering Chemical Reactions and Balancing Equations
- Exploring the Impact of atomic structure on Chemical and Physical Properties
- Grasping States of Matter: Solids, Liquids and Gases
- Exploring Electron Configuration and Energy Levels
- Unpacking the Quantum Mechanical Model of the Atom
- Understanding the Trends in Ionization Energy and Atomic Radius across Periodic Table
- Gain knowledge about Transition Metals and their Properties
- Grasp the Concept of Electron Orbitals and Sublevels
- Exploring Covalent Radii and Ionic Radii in the Periodic Table
☑️ Energy 7 topics
- Energy Changes and Storage: Energy Stores and Systems
- Energy Changes and Storage: Changes in Energy
- Energy Changes and Storage: Energy Changes in Systems
- Energy Changes and Storage: Power
- Conservation and Dissipation of Energy: Energy Transfers in a System
- Conservation and Dissipation of Energy: Efficiency
- National and Global Energy Resources
☑️ Electricity 10 topics
- Current, Potential Difference and Resistance: Standard Circuit Diagram Symbols
- Current, Potential Difference and Resistance: Electrical Charge and Current
- Current, Potential Difference and Resistance: Current, Resistance and Potential Difference
- Current, Potential Difference and Resistance: Resistors
- Series and Parallel Circuits
- Domestic Uses and Safety: Direct and Alternating Potential Difference
- Domestic Uses and Safety: Mains Electricity
- Energy Transfers: Power
- Energy Transfers: Energy Transfers in Everyday Appliances
- Energy Transfers: The National Grid
☑️ Particle Model of Matter 5 topics
- Changes of State and The Particle Model: Density of Materials
- Changes of State and The Particle Model: Changes of State
- Internal Energy and Energy Transfers: Temperature Changes in a System and Specific Heat Capacity
- Internal Energy and Energy Transfers: Changes of State and Specific Latent Heat
- Particle Model and Pressure: Particle motion in gases
☑️ Atomic Structure 7 topics
- Atoms and Isotopes: The Structure of an Atom
- Atoms and Isotopes: Mass Number, Atomic Number and Isotopes
- Atoms and Isotopes: The Development of the Model of the Atom
- Atoms and Nuclear Radiation: Radioactive Decay and Nuclear Radiation
- Atoms and Nuclear Radiation: Nuclear Equations
- Atoms and Nuclear Radiation: Half-Lives and the Random Nature of Radioactive Decay
- Atoms and Nuclear Radiation: Radioactive Contamination
☑️ Forces 20 topics
- Forces and Their Interactions: Scalar and Vector Quantities
- Forces and Their Interactions: Contact and Non-Contact Forces
- Forces and Their Interactions: Gravity
- Forces and Their Interactions: Resultant Forces
- Work Done and Energy Transfer
- Forces and Elasticity
- Forces and Motion: Describing Motion Along a Line: Distance and Displacement
- Forces and Motion: Describing Motion Along a Line: Speed
- Forces and Motion: Describing Motion Along a Line: Velocity
- Forces and Motion: Describing Motion Along a Line: The Distance–Time Relationship
- Forces and Motion: Describing Motion Along a Line: Acceleration
- Forces and Motion: Forces, Accelerations and Newton's Laws of Motion: Newton's First Law
- Forces and Motion: Forces, Accelerations and Newton's Laws of Motion: Newton's Second Law
- Forces and Motion: Forces, Accelerations and Newton's Laws of Motion: Newton's Third Law
- Forces and Motion: Forces and Braking: Stopping Distance
- Forces and Motion: Forces and Braking: Reaction Time
- Forces and Motion: Forces and Braking: Factors Affecting Braking Distance 1
- Forces and Motion: Forces and Braking: Factors Affecting Braking Distance 2
- Momentum: Definition
- Momentum: Conservation of Momentum
☑️ Waves 6 topics
- Waves in Air, Fluids and Solids: Transverse and Longitudinal Waves
- Waves in Air, Fluids and Solids: Properties of waves
- Electromagnetic Waves: Types of Electromagnetic Waves
- Electromagnetic Waves: Properties of Electromagnetic Waves 1
- Electromagnetic Waves: Properties of Electromagnetic Waves 2
- Electromagnetic Waves: Uses and Applications of Electromagnetic Waves
☑️ Magnetism and Electromagnetism 5 topics
- Magnetism: Poles of a Magnet
- Magnetism: Magnetic fields
- The Motor Effect: Electromagnetism
- The Motor Effect: Fleming's Left-Hand Rule
- The Motor Effect: Electric Motors
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GCSE Physics (Combined) AQA Revision Content
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GCSE Physics (Combined) AQA - Atomic structure and the periodic table - Understanding the Structure of an Atom: Protons, Neutrons, and Electrons Content Preview
Atomic structure and the periodic table
Understanding the Structure of an Atom: Protons, Neutrons, and Electrons
Structure of an Atom
- An atom is the smallest constituent of matter that still retains its chemical properties.
- Atoms consist of three types of subatomic particles: protons, neutrons, and electrons.
Protons
- Protons are subatomic particles that have a positive charge.
- They are found in the nucleus of the atom.
- The number of protons in an atom is referred to as the atomic number, and it determines the element the atom represents. For example, hydrogen has one proton, helium has two, and so on.
Neutrons
- Neutrons are subatomic particles that have no charge; they are neutral.
- Like protons, neutrons are also found in the atom's nucleus.
- The combined number of protons and neutrons in an atom is known as the mass number.
Electrons
- Electrons are subatomic particles that carry a negative charge.
- They move in electron shells or energy levels, which surround the nucleus of an atom.
- An atom usually has the same number of electrons as protons, and thus is overall electrically neutral.
- The arrangement of electrons in shells influences an atom's chemical properties and its reactivity.
Atomic and Mass Numbers
- The atomic number (Z) of an atom is equivalent to the number of protons.
- The mass number (A) is the total number of protons and neutrons in an atom.
- To find the number of neutrons, subtract the atomic number from the mass number (neutrons = mass number - atomic number).
Isotopes
- Isotopes are atoms of the same element (so have the same atomic number) but with different numbers of neutrons, and so, different mass numbers.
- Isotopes of a single element share chemical properties, but often have different physical properties.
Remember, understanding the structure of an atom is fundamental to your understanding of all the other complex atomic phenomena!
Question: A neutral atom of chlorine has atomic number 17 and mass number 35; how many neutrons does it contain?
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