Скачать или смотреть GCSE Chemistry - Atoms & Ions | Protons, Neutrons, Electrons (2026/27 exams)

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Triple and combined science

** WHAT'S COVERED **
1. Introduction to Atoms
The fundamental nature of atoms as the particles constituting all matter.
The vast quantity of atoms present in everyday materials, including biological cells.
2. Atomic Structure Overview
The main components of an atom: a central nucleus and orbiting electrons.
The arrangement of electrons in shells or energy levels around the nucleus.
3. Subatomic Particles Explored
Identification of the three main subatomic particles: protons, neutrons, and electrons.
Comparison of the relative masses of these particles.
Comparison of the relative electrical charges of these particles.
4. Atomic Dimensions and Internal Composition
The typical scale of an atom's radius (e.g., nanometres).
The understanding that atoms are predominantly empty space.
The extremely small size of the nucleus in relation to the overall atomic volume.
5. Electrical Neutrality and Ion Formation
Explanation of how atoms maintain electrical neutrality.
The process of ion formation: how atoms become charged by gaining or losing electrons, forming positive or negative ions.
6. Elements, The Periodic Table, and Nuclear Symbols
Introduction to elements as unique categories of atoms.
Understanding nuclear symbols as presented in the periodic table, covering elemental symbols, atomic numbers, and mass numbers.
7. Determining Subatomic Particle Counts
Utilising the atomic number to ascertain the number of protons (and thereby identify an element).
Using the atomic number to find the number of electrons in a neutral atom.
Calculating the number of neutrons from the mass number and atomic number.

** CHAPTERS **
0:00 What are Atoms?
0:34 Basic Atomic Structure: Nucleus and Electron Shells
1:01 Protons, Neutrons, and Electrons
1:18 Relative Mass
1:38 Relative Charge
2:33 Atomic Dimensions
3:29 Atoms & Ions
5:02 Periodic Table & Nuclear Symbols
6:03 Calculating No. of Protons, Neutrons, and Electrons

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