Because the central atom has two bonded regions (remember that single, double, and triple bonds all count as one charge cloud). In addition to the two bond regions, there is a lone pair of electrons on the central atom, which counts as the third charge cloud.
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SO2 has three charge clouds because it has one sulfur atom and two oxygen atoms bonded together. This results in two sigma bonds and one lone pair of electrons around the sulfur atom, totaling three charge clouds.
The top of a cloud in a thunderstorm typically carries a positive charge. This positive charge builds up due to ice crystals and water droplets colliding and separating within the cloud, creating an imbalance of positive and negative charges.
The ground directly below a storm cloud may experience heavy rainfall, lightning strikes, and strong winds. In some cases, hail may also fall to the ground.
Electrical charge separation in a cloud occurs as ice particles and water droplets within the cloud collide and interact. Due to the collision, electrons are transferred from smaller particles to larger particles, creating a charge separation. These charged particles then accumulate in different regions of the cloud, leading to the buildup of a significant voltage potential between the cloud and the ground, or between different parts of the same cloud.
The question is somewhat flawed. Isoelectric means when two different atoms possess the same electron configuration - i.e. one has to be an ion. As an arbitrary example, H- and He would both be 1s2, and isoelectric. Sulfur and oxygen are not isoelectric, sulfur has a whole extra shell of electrons. If you simply mean, is SO2 a charge molecule? Then no, there is no nett charge on SO2. It is, however, a polar molecule, due to being bent (similar to water).
There are two double bonds.So there are two pi bonds.