- orderly arrangement of particles
- particles are packed closely together, and vibrate about a fixed position. They are also held together by strong forces of attraction
- solid cannot be compressed, and has a fixed shape.
- particle are less closely packed together, and are able to move throughout the liquid. Particles are also held together by moderately strong forces of attraction.
- liquids cannot be compressed, and they do not have a fixed shape (take the shape of the container).
- particles are far apart, and move about randomly and in all directions. Forces of attraction between particles are weak.
- Gases can be compressed (they take the volume of the container), and do not have a fixed shape.
Hydrogen chloride has a formula of HCl. This means that it consists of 1 chlorine atom and 1 hydrogen atom per molecule. From the periodic table, the mass number of nitrogen is 35.5 and the mass number of hydrogen is 1. The molecular mass of hydrogen chloride = 1 + 35.5 = 36.5.
The lower the molecular mass, the faster the rate of diffusion of the gas. Hence, ammonia diffuses faster than hydrogen chloride.
- Quizzes and Tests on Particulate Theory of Matter