GCSE Chemistry - Elements, Isotopes & Relative Atomic Mass (2026/27 exams) скачать в хорошем качестве

GCSE Chemistry - Elements, Isotopes & Relative Atomic Mass (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ ** WHAT'S COVERED ** 1. Elements and Atomic Structure Recap of subatomic particles (protons, neutrons, electrons). The significance of proton number (atomic number) for element identification. Overview of the Periodic Table, nuclear symbols, and element symbols. 2. Isotopes Explained Definition of isotopes: atoms of the same element with the same proton number but different neutron numbers. Illustration with Carbon-12 and Carbon-13. Note on how isotopes affect mass number while chemical properties remain largely similar. 3. Relative Atomic Mass (Ar) Concept of Ar as the weighted average mass of an element's isotopes, taking into account their abundances. Formula for calculating Ar based on isotopic masses and percentage abundances. A worked example: calculating the Ar of copper. ** CHAPTERS ** 0:00 Introduction 0:20 Proton Number 0:49 Nuclear Symbols 2:24 What are Isotopes? 3:32 Chemical Behaviour of Isotopes 3:42 Relative Atomic Mass (Ar) 3:58 Isotopic Abundance 4:48 Calculating Ar ** PLAYLISTS **    • GCSE Maths (9-1)      • GCSE Biology (9-1)      • GCSE Chemistry (9-1)      • GCSE Physics (9-1)      • A-Level Biology   #GCSE #Chemistry #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE