Identify the types of intermolecular forces found for each of the liquids and relate these to the shape of the drop as seen from the side. Include the terms cohesive and adhesive forces properly in your explanations.
What forces (dipole-dipole, hydrogen bonds, or dispersion forces) are present in each sample?
a) C12H26 (oil)
b) H2O (water)

Explanation:

Oil molecules are non-polar, and they can't form hydrogen bonds. Dispersion forces are present in C12H26 (oil).

H20 (water) are polar, has hydrogen bonds, it also has dipole-induced dipole and London dispersion forces.

The difference between them is that adhesion refers to the clinging of unlike molecules and cohesion refers to the clinging of like molecules.

In C12H26 (oil)  the adhesive forces are stronger than the cohesive forces as a result, oil molecules tend to stick to the walls of the container.

In  H2O (water) the cohesive forces is greater than the adhesive forces, as a result water molecules tend to stick together.

the product of the pressure and volume is also constant

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.