Before the element scandium was discovered in 1879, it was known as “eka-boron.” Predict the properties of scandium from averages of the corresponding properties of its neighboring elements in the periodic table. Compare your predictions with the observed values in Appendix F. Element Symbol Melting Point (°C) Boiling Point (°C) Density (g cm23 ) Calcium Ca 839 1484 1.55 Titanium Ti 1660 3287 4.50 Scandium Sc ? ? ?

Before the element scandium was discovered in 1879, it was known as “eka-boron.” Predict the properties of scandium from averages of the corresponding properties of its neighboring elements in the periodic table. Compare your predictions with the observed values in Appendix F. Element Symbol Melting Point (°C) Boiling Point (°C) Density (g cm23 ) Calcium Ca 839 1484 1.55 Titanium Ti 1660 3287 4.50 Scandium Sc ? ? ?

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