Answer: A tidal force is related to gravity, but it isn't the same thing. It's really the difference between the the strength of gravity at two locations. The gravitational attraction between two objects (say the Earth and the Moon) decreases with distance.
The tidal force acting on an astronomical body, such as the Earth, is directly proportional to the diameter of that astronomical body and inversely proportional to the cube of the distance from another body producing a gravitational attraction, such as the Moon or the Sun.
Gravity is the force that keeps us standing. It keeps us from floating, like you do when you are in space, away from gravity.
Tidal Force - The tidal force is a force that stretches a body towards and away from the center of mass of another body due to a gradient (difference in strength) in gravitational field from the other body
the electronegativity of atoms increases from left to right across a period in the periodic table; it also decreases as you move from top to bottom down a group in the periodic table
