The two factors that affect the gravitational force between two  objects are Mass and Distance.   The mass of the two objects and the distance between them according to Kepler's Law Fg = GMm/d^2. Gravity exerts itself between all bodies in the universe. It is related to the mass of the bodies and the distance between them.
Note: none of these elements exists freely; all are found chemically combined with other elements in compounds. Although there are over 100 elements, only 12 or so are used to make biological materials. Living organisms are built predominantly from non-metal elements.
There are 80 elements that have at least one stable isotope and 38 that have exclusively radioactive isotopes, which decay over time into other elements. Iron is the most abundant element (by mass) making up the Earth, while oxygen is the most common element in the crust of the earth.Chemical elements constitute approximately 15% of the matter in the universe: the remainder is dark matter, the composition of it is unknown, but it is not composed of chemical elements.he atomic number of an element is equal to the number of protons in each atom, and defines the element. For example, all carbon atoms contain 6 protons in their atomic nucleus; so the atomic number of carbon is 6.