In this module you study about 'State of matter'
State of matter -- Introduction:Matter: "Matter is anything that has mass and occupies space".State of matter: Matter exists in three states.Solid state, Liquid state, Gaseous state, Solid state:They have definite shape and definite volume.Ordered arrangement of particles; distances between the particles are very small and Fixed. Intermolecular forces are high; vibrational motion only.They have High Density, Particles are nearly incompressible, They are not Fluids. Diffuse very slowly only through solids.Liquid state:They have no definite shape. i.e., assume the shape of the container Have definite volume.Disordered clusters of particles; quite close to each other; random motion; considerable intermolecular attraction. They have intermediate density.They are slightly compressible.They are fluids, diffuse through other liquids.Gaseousstate:Gaseoushave no definite shape and no definite volume.They are extremely disordered particles. Much empty space. Particles have random motion. Intermolecular attraction is very small.They have low viscosity and density.They have high compressibility.They are fluids, diffuse rapidly.Importantpoints aboutGases:Number of gaseous elements are eleven11 HydrogenH2, Helium He, Neon Ne, Argon Ar, KryptonKr, Xenon Xe, RadonRn, Nitogen N2, OxygenO2,FlourineF2, ChlorineCl2.Most reactive gaseous element is fluorine.Lightest gaseous, non-metal is hydrogen.Heaviest gaseous non-metal is Radon.Noble gases have lowest electron affinity.Highest ionization potential is noble gas Helium.Most abundant inert gas in sun's atmosphere is Helium.Most abundant inert gas in atmosphere is Argon.Mostabundant element in earth crust is oxygen.Most abundant element in atmosphere is nitrogen.

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