Particles of dust<span>, </span>soil<span>, fecal matter, metals, </span>salt<span>, </span>smoke<span>, </span>ash<span>, and other solids </span>make<span>up a small percentage of the atmosphere and are called particulates. Particles provide starting points (or nuclei) for </span>water vapor<span> to </span>condense on<span> and form raindrops. Some particles are pollutants.</span>
The particulate matters are defined as the aerosol particles that are found to be present freely in the atmosphere. They are the mixture of dust, soil, salt, liquid drops, smoke and ashes. They can be formed both naturally and from the anthropogenic activities. These smaller particles present in the water vapor undergoes condensation, forming liquid and ice on the surfaces of dust particles present in the atmosphere. With more frequent condensation of water vapor, results in the formation of clouds.
<span>A full filled atom is more
stable than the half filled atom. This is because it has an equal number of
protons and electrons. The protons cancel out the electrons and thus
giving it a net charge of zero. It cannot be further ionized.</span>
