Why are the inner planets rocky while the outer planets are mostly in gaseous form?

# The terrestrial planets were formed in the close vicinity of the parent star where it was too warm for gases on the surface to condense to solid particles.

# The solar wind was most intense nearer the sun; so, it blew off lots of gas and dust from the surface of the terrestrial planets.

# The solar winds were not all that intense to cause similar removal of gases from the Jovian planets.

# The terrestrial planets are smaller, and their lower gravity could not hold the escaping gases.