Predicting the properties of francium
1 mark · EasyState one physical property that francium is predicted to have, based on trends in Group 1 of the Periodic Table.
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Also accept: Very soft; Silvery metal; Melting point around room temperature; Density just over 2 g/cm3; Tarnishes almost instantly in air
Common mistakes: Describing properties of Group 1 generally without stating a property for francium; Giving chemical, not physical, properties
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Marking points
B1 · 1 mark · States any valid predicted physical property of francium based on Group 1 trends.
Worked solution
Francium is predicted to be very soft. (Accept other valid physical properties, such as: it would be a silvery metal, have a melting point around room temperature, a density just over 2 g/cm³, or it would tarnish almost instantly in air.)