Element Properties and Periodicity — OCR GCSE Combined Science B J260
OCR GCSE Combined Science B · J260
Element Properties and Periodicity
What you need to know
Explain how an element's precise position in the Periodic Table relates to its atomic number and outer electron arrangement.
Describe Mendeleev's initial organization of elements based on their observable properties and relative atomic masses.
Explain how the discovery of new elements and the transition to atomic number ordering validated Mendeleev's decision to leave gaps and reorder certain elements.
Distinguish between metals and non-metals based on characteristic physical and chemical properties, such as melting point, boiling point, state, density, compound formulae, reactivity, and electrical conductivity.
Recall the characteristic properties of Group 1 elements, including their reactions with moist air, water, and chlorine.
Recall the properties of Group 7 elements, including their physical states and colors at room temperature, gaseous colors, reactions with Group 1 elements, and displacement reactions with other metal halides.
Predict the probable reactivity and potential chemical reactions of elements based purely on their position in the Periodic Table.
Describe experimental procedures designed to identify the reactivity patterns of Group 7 elements through displacement reactions.
Describe experimental procedures used to identify the reactivity pattern of Group 1 elements.
