The right is a bunch of polar and non-polar molecules. Explore how different or similar molecules form intermolecular attractions when they are close together. Then take a snapshot of the model, and use the drawing tools to show where you see the attractions. Then take a snapshot of the model, and use the drawing tools to show where you see the attractions (Use the pen/annotate). Required:
What formed intermolecular attractions?

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.