Which compound would you expect to have the highest melting point?
BeO
MgO
CaO
SrO
devron you're wrong mate
because Be has the highest electronegativity difference, it will form the most polar molecule meaning the permanent diploe-dipole forces will be the strongest, therefore the highest melting point
To determine which compound would have the highest melting point among BeO, MgO, CaO, and SrO, we need to consider the trends in melting points in the periodic table.
The melting point generally increases with increasing ionic charge and decreasing ionic radius. Going down a group (from top to bottom) in the periodic table, the ionic size generally increases, while across a period (from left to right), the ionic size generally decreases.
In this case, all the compounds are from Group 2 of the periodic table, which means they have a +2 charge. However, as we go down the group, the ionic radius increases, which suggests that the melting point would decrease.
Based on this trend, we can predict that BeO, being at the top of Group 2, would have the highest melting point, followed by MgO, CaO, and then SrO.
To determine which compound would have the highest melting point, we need to consider the factors that affect melting temperature. Generally, compounds with stronger chemical bonds have higher melting points.
In this case, we can compare the compounds based on the strength of the chemical bonds between the metal cations (Be, Mg, Ca, Sr) and the oxygen anions (O).
The strength of the chemical bond is influenced by the charge of the metal cation and the size of the cation. As we move down Group 2 in the periodic table, the size of the cations increases, while the charge remains the same (+2).
Considering these factors, the compound with the highest melting point would be the one with the smallest cation and the highest charge, as they typically form stronger ionic bonds.
Therefore, the compound that would be expected to have the highest melting point among BeO, MgO, CaO, and SrO is CaO (calcium oxide).
The one with the greater electronegativity difference. Electronegativity increase up and to the right of the periodic table, so the atom that is attached to O with smallest electronegativity should be the one with the highest melting point. But I am not 100% positive.
SrO is my choice.