Where there is mass there is gravity.
The force of gravity of a planet is a product of its mass.
the force
The larger the planet mass, the bigger force of gravity it has.
No Mercury, either the metal or the planet is not equal to gravity. Gravity is a force of nature, not a planet or a substance.
YES! The bigger or more dense the planet is, the higher the force of gravity.
gravity
The force due to gravity of a planet is dependent on the mass of that planet (and to a lesser extent the radius/diameter). If a planet is less massive then it will have a lower gravitational force.
Gravity.
weight
Jupiter
simple, the larger the planet, the greater the force of gravity.
The surface gravity of Venus is 90.4% that of Earth.