Chemistry of water

QUESTIONS
1. Describe how water molecules are bonded.
2. Describe how the positive and negative changes at water are distributed.
3. Describe the chemistry of water that allows an insect to walk on water.
4. What is unique about water and its density.

ANSWERS
1. each hydrogen nucleus is bout to the central oxygen atom by a pair of electrons that shared between then, called covalent chemical bonds.
2. negative charge is concentrated at the oxygen end of the molecule to oxygens high nuclear charge w/ exerts strong attactions on the electrons.
3. the water strider goes across the water due to the surface tension of the water. It helps it to glide/walk across the water quickly.
4.When water is a solid its less dense. Also the strong hydrogen - bonding forces in the water make it unique.