portinabox.blogg.se

• HYDROGEN BONDS FULL

I hope this isn't too long and you got what you needed. Adhesion takes place when a molecule of one type is attracted to a molecule of a different type, for example, two different elements.

HYDROGEN BONDS FULL

This would create full negative and positive charges.Ĭohesion occurs when like molecules are mutually attracted (they are each attracted to each other).

If the bond was ionic, the electrons that would have been shared in a covalent bond would be stolen by the more electronegative atom. They're only partially negative because the bond is covalent, or shared. Remember, charge is created by an imbalance of protons and electrons int the atom. Oxygen becomes partially negative because of the additional negative charge from the electrons, and hydrogen becomes partially positive because of the loss of negative charge from the electrons. Oxygen is more electronegative than hydrogen - that is, it has a stronger pull on the electrons than the hydrogens do - creating a partial charger difference, represented by the Greek lowercase letter delta. Because of that pull, the electrons spend more time with the oxygen in water than the hydrogen. The reason for this is that electrons carry a negative charge. Because one member of the covalent bond pulls more strongly on the electrons than the other one does, we start to see a charge difference beginning to build up. It's just the technical explanation for why they want to share their electrons and how it makes them more stable.

If you haven't seen that yet, don't worry. They want to satisfy the octet rule or have a full valence shell. Covalent bonds are bonds that are formed when two atoms "share" their electrons to become more stable. Electronegativity is the amount of "pull" that the members of a covalent bond exert on their shared electrons. Hello Esther! Polarity is the result of electronegativity.