Decide what kind of crystalline solid each element or compound in the table forms, and what kind of force holds the solid together.

Then, rank the solids in order of decreasing melting point. That is$,$ select $"1"$ next to the solid with the highest melting point, $"2"$ next to the solid with the next highest melting point, and so on$.($You may need to use the scrollbar to see all the choices.$)$

$\backslash$table$[[\backslash$table$[[$lement$],[$or$],[$compound$]],\backslash$table$[[$type of solid$],[$formed$]],\backslash$table$[[$force holding the$],[$solid together$]],\backslash$table$[[$melting point$],[$of solid$]]],[HI,,$hydrogen$-$bonding $,3($lowest$)],[O_2,,$ionic bonding,$1($highest$)],[BaO,,[,]]$