AQA Trilogy GCSE Science - Science
Mission Objectives
Describe the properties of halogens
Explain why the elements in Group 7 react similarly
Explain the trend in reactivity as you go down Group 7
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Words and meanings to learn
halogen
any of the elements found in Group 7 of the periodic table
diatomic
a molecule consisting of two atoms, such as hydrogen (H₂), oxygen (O₂), nitrogen (N₂), and the halogens (e.g., Cl₂, Br₂)
halide
a compound formed when a halogen reacts with another element, often a metal, halides contain halide ions (e.g., Cl⁻, Br⁻, I⁻)
non-metal
a type of element that lacks the properties of metals; they are typically poor conductors of heat and electricity, have lower densities, and are not malleable or ductile
volatility
a measure of how readily a substance evaporates; a volatile substance has a high tendency to turn into vapour at a given temperature and pressure
Samantha is a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders.
Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.
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