fluorine

Generally, yes. A bigger difference in electronegativity indicates that the bond is more ionic. Since ionic bonds are known to have strong bonding characteristics, it makes sense that the more ionic a bond is, the stronger the bond.

As you must be knowing, opposites attract and the sheer electrostatic attraction between the molecules of the compound will tend to make the compound, as a whole, have a much higher Boiling and/or Melting point. Higher electronegativity means higher polarity in the molecule containing such atom.

The 2 most electronegative elements on the periodic table are Fluorine and Oxygen.

Cesium

For ex: Mg with atomic number = 12 has E.C = 2,8,2 so it has 2 valence electrons and hence can easily lose them to gain the noble gas configuration of Neon (2,8). So, it is electropositive in nature.

Magnesium oxide is a simple basic oxide, because it contains oxide ions. It reacts with water to form magnesium hydroxide which is a base.

Therefore, because silicon dioxide does not contain oxide ions, it has no basic properties. In fact, it is very weakly acidic, reacting with strong bases. Reaction with water: Silicon dioxide does not react with water, due to the thermodynamic difficulty of breaking up its network covalent structure.

So, SiO2,GeO2, SnOand PbOare acidic, amphoteric, amphoteric, basic respectively.

Antimony trioxide (sb2o3) is an amphoteric oxide.

Arsenious oxide