Variations in electronegativity result in the unequal sharing of electrons in polar molecules because when one atom is more electronegative than the other, it becomes more polar than the other atom. ... Methane bonds are covalent because they share carbon and hydrogen valence electrons.xplanation:
If an object has a high density then the molicules making up that object are closly packed togeather. Because of this, objects with a higher density will have more mass than objects of the same size that have a lesser density.
