1. What determines which elements combine and how they bond together?

2. Potassium is a metal with one valence electron. With which other elements does it form bonds?
A. elements with one electron
B. elements with two electrons
C. elements with five electrons
D. elements with seven electrons

3. Which type of bonds does potassium form? Which type of bond is most common?

4. Describe a covalent bond and how it forms. Give an example of a compound with covalent bonds.

5. Compare and contrast polar and nonpolar covalent bonds.

6. What is an ionic bond? How does it form? Give an example of a compound with ionic bonds

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.