English National Curriculum - 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 an accomplished science educator with over 15 years of leadership experience and a strong background in scientific analysis. She has a proven record of leading departments effectively, improving practice, and working collaboratively with stakeholders.
In her current work, Samantha embeds evidence-informed pedagogical principles such as retrieval practice, clear modelling, and effective sequencing to support high-quality curriculum design and professional development. She draws on assessment insight and common misconceptions to help teachers secure strong student understanding.
She is a former Head of Chemistry and Sixth Form Tutor at Ilkley Grammar School, with extensive Key Stage 4 and 5 experience, and an AQA examiner, giving her valuable insight into assessment standards and exam requirements.
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