Properties of materials (C2.3) | OCR GCSE Chemistry A (Gateway Science) — Higher (J248) | KnowledgeSet

Properties of materials

Chemistry (Separate Science) · GCSE · OCR · OCR GCSE Chemistry A (Gateway Science) — Higher (J248) · Specification point · C2.3 · Elements, compounds and mixtures

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Learning Objectives

C2.3 Properties of materials

Summary This section explores the physical properties of elements and compounds and how the nature of their bonding is a factor in their properties. Underlying knowledge and understanding Learners will know the difference between an atom, element and compound. Common misconceptions Learners commonly have a limited understanding of what can happen during chemical reactions, for example substances may explode, burn, contract, expand or change state.

Reference	Mathematical learning outcomes	Mathematical skills
$CM2.3i$	$represent three-dimensional shapes in two dimensions and vice versa when looking at chemical structures, e.g. allotropes of carbon$	$M5b$
$CM2.3ii ☑$	$relate size and scale of atoms to objects in the physical world$

Learning outcomes	To include	Maths	Working scientifically	Practical suggestions
$C2.3a recall that carbon can form four covalent bonds$			$WS1.4a$
$C2.3b explain that the vast array of natural and synthetic organic compounds occur due to the ability of carbon to form families of similar compounds, chains and rings$
$C2.3c explain the properties of diamond, graphite, fullerenes and graphene in terms of their structures and bonding$		$M5b$	$WS1.4a$
$C2.3d use ideas about energy transfers and the relative strength of chemical bonds and intermolecular forces to explain the different temperatures at which changes of state occur$			$WS1.2a, WS1.3f, WS1.4a, WS1.4c$
$C2.3e use data to predict states of substances under given conditions$	$data such as temperature and how this may be linked to changes of state$
$C2.3f explain how the bulk properties of materials (ionic compounds; simple molecules; giant covalent structures; polymers and metals) are related to the different types of bonds they contain, their bond strengths in relation to intermolecular forces and the ways in which their bonds are arranged$	$recognition that the atoms themselves do not have the bulk properties of these materials$		$WS1.4a$
$C2.3g ☑ compare ‘nano’ dimensions to typical dimensions of atoms and molecules$		$M4a, M1d, M1b$	$WS1.4c, WS1.4d$
$C2.3h ☑ describe the surface area to volume relationship for different-sized particles and describe how this affects properties$		$M1c$	$WS1.4c$	$Dissolving tablets. (PAG C8)$
$C2.3i ☑ describe how the properties of nanoparticulate materials are related to their uses$		$M5c$	$WS1.1c, WS1.1e, WS1.3c, WS1.4a$
$C2.3j ☑ explain the possible risks associated with some nanoparticulate materials$			$WS1.1d, WS1.1f, WS1.1h, WS1.1i WS1.4a$