What ate advantage of useing the plastic snap-together toy like the one shown picture as a model for elements and compounds

The correct answer is "hydrogen".

Ithink its called the coefficent.

The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).