Cornstarch, a carbohydrate consisting of hydrogen, carbon and oxygen: ionic covalent

Cornstarch is a carbohydrate that consist of hydrogen, carbon and oxygen. The type of chemical bond that is found in cornstarch is COVALENT BOND.
Covalent bond is a type of chemical bond in which pairs of electrons  are shared between participating atoms. It is also called molecular bond. Most organic compounds in nature are bonded together by covalent bond; this gives the molecules the opportunity to bond in various ways with different elements.  

Gallium melts near room temperature and has one of the largest  liquid  ranges of any metal, so it has found use in high temperature thermometers.

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?