Each O-H bond in a water molecule is highly ___1___. Oxygen acquires a partial ___2___ charge while hydrogen acquires a partial ___3___ charge. Because the H-O-H bond angle is 105 degrees, the water molecule as a whole is ___4___. Water molecules are attracted to each other by intermolecular ___5___ bonds. This bonding accounts for many properties of water, such as its___6___ vapor pressure and ___7___ boiling point. Hydrogen bonding is also responsible for the high ___8___ tension of water. Liquids tend to minimize their surface area and form ___9___ droplets because of their surface tension. The surface tension of water can be reduced by adding a ___10___. ___11___ floats in liquid water. This is because it is less ___12___ than water. Ice has a rigid, open structure, which is also due to ___13___.

1(polar), 2(Negative), 3(positive),4(polar), 5(hydrogen), 6(low), 7(high), 8(surface), 9(shperical), 10(surfactant), 11(Ice), 12(dense), 13(hydrogen bonding).

Explanation:

The summary of the question is about water molecules and it's properties. It is made up of two hydrogen atoms and one atom of oxygen. Water molecule is polarized to some extent due to the high electronegativity of oxygen. Some of the physical properties of water includes:

--> it is colourless, odourless and tasteless liquid.

--> Boiling point of water is 100°C while the melting point is 0°C.

--> It is denser than ice.( Ice floats on top of water).

--> Usually described as a universal solvent due to its ability to dissolve many substances.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.