Cobalt highest melting points

Cobalt has the highest Curie point of any metal or alloy of cobalt. The Curie point is the temperature at which an element will lose its magnetism before it reaches its melting point. 

The densities of the metals fall into two groups, those in the final triad being the highest of all the elements, nevertheless the atomic volumes are slightly greater than those of iron, cobalt and nickel. Ruthenium and osmium have h.c.p. structure, the rest f.c.c. Melting points decrease with atomic number rather quickly in each triad, but all are high. 

The melting point of cobalt is 1495°C, and that of barium chloride is 963°C. Rank the four substances in problem 27 from lowest to highest in melting point. 

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