Which statement is true about water molecules?
a. the oxygen atom has a negative charge.
b. the hydrogen atoms do not share electrons.
c. water molecules move randomly around each other.
d. water molecules cannot dissolve many substances.

how does water relate to the ability of a living thing to generate energy?
a. water is responsible for the generation of energy in the cell.
b. the cell is an aqueous environment.
c. without the proper balance of water, chemical reactions in cells could not take place.

what is the most important role of hydrogen bonding between water molecules?
a. it enables water molecules to bond to each other.
b. it allows oxygen and hydrogen atoms to be charged.
c. it allows cells to keep water in balance.

1. The correct option is A, THE OXYGEN ATOM HAS A NEGATIVE CHARGE. A water molecule is made up of two atoms of hydrogen and one atom of oxygen. The molecules of water are arranged in such a way that, the negative hydrogen atom is attracted to the positive hydrogen atom and the overall structure is bent. Because oxygen is more electronegative than hydrogen, oxygen atom draws the shared electrons toward itself , this gives the oxygen end of the molecule a partial negative charge and the hydrogen end, a partial positive charge.
 
2. The correct option is: WITHOUT THE PROPER BALANCE OF WATER, CHEMICAL REACTIONS WILL NOT TAKE PLACE. Metabolic chemical reactions take place in living cells all the time because water, which is a necessary condition for the reaction is in place. Th fluids find in the cells are mostly water; water creates suitable conditions for biochemical reactions to take place. Without water, the cells will not be able to carry out any chemical reaction.

3. The correct option is A. Hydrogen bond allows oxygen and water molecules to be bonded together. Hydrogen bonds are weak interactions that formed between the hydrogen with a patial positive end and oxygen with a patial negative end. The hydrogen bond in water is responsible for the unique properties associated with water.

The correct answer should be "electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model."