First Class Test

Headline: First Class Test.

Today, we had our first class test and it is on the topic, Particulate Model of Matter.

I have learnt that when an element has good electrical conductivity and has the highest melting point, it will have the strongest forces of attraction between its particles. This is because the heat supplied will have a hard time overcoming the forces of attraction between the particles and therefore, having the highest melting point. However, does the density of the element affect the forces of attraction between the particles?

I have also learnt that when an iron nail is dropped into a glass of water, it sinks to the bottom of the glass. This is because an iron nail is a solid in which their particles are arranged in a fixed, regular pattern and are packed very closely together. But the particles of water are arranged in a disorderly pattern. Thus, the iron nail of a fixed mass and a smaller volume has a higher density than water.