Planets that are smallest to the sun revolve at a faster speed?

Yes, planets that are closer to the Sun, like Mercury and Venus, revolve at faster orbital speeds due to stronger gravitational attraction from the Sun. According to Kepler's laws of planetary motion, the closer a planet is to the Sun, the shorter its orbital period, meaning it takes less time to complete one orbit. This is why Mercury, the smallest and closest planet to the Sun, has the highest orbital speed.