The solar system likely began as a huge cloud of gas and dust. the force that most likely caused this cloud to form the large clumps that became the sun and planets is

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.